feat: update Go to 1.25.6

Also:

```
| Package | Type | Update | Change |
|---|---|---|---|
| [curl/curl](https://redirect.github.com/curl/curl) |  | minor | `8_17_0` → `8_18_0` |
| https://github.com/sabotage-linux/gettext-tiny.git |  | digest | `55a8ae9` → `acca7c3` |
| [https://gitlab.com/gnutls/libtasn1.git](https://gitlab.com/gnutls/libtasn1) |  | minor | `4.20.0` → `4.21.0` |
| [pypa/build](https://redirect.github.com/pypa/build) |  | minor | `1.3.0` → `1.4.0` |
```

Signed-off-by: Andrey Smirnov <andrey.smirnov@siderolabs.com>

Author: smira

.github/workflows/ci.yaml

@@ -1,6 +1,6 @@
 # THIS FILE WAS AUTOMATICALLY GENERATED, PLEASE DO NOT EDIT.
 #
-# Generated on 2025-12-05T15:31:48Z by kres 571923f-dirty.
+# Generated on 2026-01-16T09:58:03Z by kres 1ffefb6.
 
 concurrency:
   group: ${{ github.head_ref || github.run_id }}
@@ -63,7 +63,7 @@ jobs:
           git fetch --prune --unshallow
       - name: Set up Docker Buildx
         id: setup-buildx
-        uses: docker/setup-buildx-action@e468171a9de216ec08956ac3ada2f0791b6bd435 # version: v3.11.1
+        uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f # version: v3.12.0
         with:
           append: |
             - endpoint: tcp://buildkit-arm64.ci.svc.cluster.local:1234
@@ -149,7 +149,7 @@ jobs:
           git fetch --prune --unshallow
       - name: Set up Docker Buildx
         id: setup-buildx
-        uses: docker/setup-buildx-action@e468171a9de216ec08956ac3ada2f0791b6bd435 # version: v3.11.1
+        uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f # version: v3.12.0
         with:
           append: |
             - endpoint: tcp://buildkit-arm64.ci.svc.cluster.local:1234

.github/workflows/weekly.yaml

@@ -1,6 +1,6 @@
 # THIS FILE WAS AUTOMATICALLY GENERATED, PLEASE DO NOT EDIT.
 #
-# Generated on 2025-12-05T15:31:48Z by kres 571923f-dirty.
+# Generated on 2026-01-16T09:58:03Z by kres 1ffefb6.
 
 concurrency:
   group: ${{ github.head_ref || github.run_id }}
@@ -46,7 +46,7 @@ jobs:
           git fetch --prune --unshallow
       - name: Set up Docker Buildx
         id: setup-buildx
-        uses: docker/setup-buildx-action@e468171a9de216ec08956ac3ada2f0791b6bd435 # version: v3.11.1
+        uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f # version: v3.12.0
         with:
           append: |
             - endpoint: tcp://buildkit-arm64.ci.svc.cluster.local:1234

Pkgfile

@@ -5,7 +5,7 @@
 format: v1alpha2
 
 vars:
-  TOOLCHAIN_IMAGE: ghcr.io/siderolabs/toolchain:v1.13.0-alpha.0-2-g0823283
+  TOOLCHAIN_IMAGE: ghcr.io/siderolabs/toolchain:v1.13.0-alpha.0-3-g3a527b1
 
   # renovate: datasource=github-tags depName=argp-standalone/argp-standalone
   argp_standalone_version: 1.5.0
@@ -62,9 +62,9 @@ vars:
   cpio_sha512: 1e1ca6b3e3e64f206f9d828a152d6b4f8f6974de7a953ff96e02698b1c3c2c777c2111450e6a71c0693e29ca8bc01c3dda9f5e829b8e3221f647414df49dff6a
 
   # renovate: datasource=github-releases extractVersion=^curl-(?<version>.*)$ depName=curl/curl
-  curl_version: 8_17_0
-  curl_sha256: 955f6e729ad6b3566260e8fef68620e76ba3c31acf0a18524416a185acf77992
-  curl_sha512: fc6349def40c3c259de2a568631507df17dff83e78a2edbb93f069586dce594439fdc88bef7ce2bed7491f35800b8c0c181c8c88e6ef656cc3c18f9834681eca
+  curl_version: 8_18_0
+  curl_sha256: 40df79166e74aa20149365e11ee4c798a46ad57c34e4f68fd13100e2c9a91946
+  curl_sha512: 50c7a7b0528e0019697b0c59b3e56abb2578c71d77e4c085b56797276094b5611718c0a9cb2b14db7f8ab502fcf8f42a364297a3387fae3870a4d281484ba21c
 
   # renovate: datasource=git-tags extractVersion=^v(?<version>.*)$ depName=git://git.savannah.gnu.org/diffutils.git
   diffutils_version: 3.12
@@ -112,9 +112,9 @@ vars:
   gawk_sha512: 2268150fa35ae049a6ff3d0d0fa110db10477014c25f50e2ab4e3ee5fd60133369d2a994f59db4eb718020a0af5c4003ae7278c63e7fffa72f431ff4a1429e48
 
   # renovate: datasource=git-refs versioning=git depName=https://github.com/sabotage-linux/gettext-tiny.git
-  gettext_tiny_ref: 55a8ae9015b7dd5b28e03e93286ab19528cc7e3e
-  gettext_tiny_sha256: 5ee774b7b6c10cc0dd663c759fa104afb8326176c81f61806317c3d93f2b2c54
-  gettext_tiny_sha512: 25325db240ab79d112c59d83e975fa466f0e69efb4348ca7b0a170349c761b54170001a49a1660eebf834a8895c11403864db52556253fdcc2af29121c361ba1
+  gettext_tiny_ref: acca7c3d509b9d9d4b33935e822a5bc39b35be01
+  gettext_tiny_sha256: 6adbcbd8b15675a0f220c7ede836c5f8c52ba9007fb8b963cb3200009940a0cf
+  gettext_tiny_sha512: 2862572d404367dcbf30a1113053ff0886f787a8a498ef11e6212cba6f8327de5290c3ea2fda47fdac1e99cb0874dafc151b0db28959cc6b8689b82e9bf90ce9
 
   # renovate: datasource=git-tags extractVersion=^v(?<version>.*)$ depName=git://git.kernel.org/pub/scm/git/git.git
   git_version: 2.52.0
@@ -173,9 +173,9 @@ vars:
   libnl_sha512: 6230b8cab608355346030cf32f37c43983b1d1b632cb7677ae383d4f2369b4a3773b35d2d51007d3b9c16f333aaf351682c4602b3d229cd602eec5ad53efd6f3
 
   # renovate: datasource=git-tags extractVersion=^v(?<version>.*)$ depName=https://gitlab.com/gnutls/libtasn1.git
-  libtasn1_version: 4.20.0
-  libtasn1_sha256: 92e0e3bd4c02d4aeee76036b2ddd83f0c732ba4cda5cb71d583272b23587a76c
-  libtasn1_sha512: 0c0660085f5e80537aa3d65197967029be6cc5e27d7029789713902989c1694fdb49421ae0415b79b953e11893bb4bdaada85f7aff847dd0bb4075c91887e7b4
+  libtasn1_version: 4.21.0
+  libtasn1_sha256: 1d8a444a223cc5464240777346e125de51d8e6abf0b8bac742ac84609167dc87
+  libtasn1_sha512: 6a581c4c072b168bf29a0dec7e59a9329a798e392b7d1033791d0e3166a5d1164e2a7065373a84018d500a01563657900c318b1fd437c227c3174b754f9998d3
 
   # renovate: datasource=git-tags extractVersion=^v(?<version>.*)$ depName=git://git.savannah.gnu.org/libunistring.git
   libunistring_version: 1.4.1
@@ -284,9 +284,9 @@ vars:
   python_sha512: 165256b4c713e0262767cd7a2c65622f3f086423524646a39bfa64912376be9e5b70863d5a3c95224b516152d0b79e7ccbfe2f2cf35b809d132f2c38ebb3ab3b
 
   # renovate: datasource=github-releases versioning=python depName=pypa/build
-  python_build_version: 1.3.0
-  python_build_sha256: fd7a275d4b34e2b5b4c73fb57ae3c8239b54e4d09752eb540d4167c77bfa043d
-  python_build_sha512: f34450ffc92a434af2614f4341b38c8feed18ce9a799196bff3f735afc52334cacb34d2a831c3264bbfaacda642a5e4defe3842f8010cd687d47e2d018a191d0
+  python_build_version: 1.4.0
+  python_build_sha256: 8d69501c4802d5af985db4b1c3841f094a9e951475f07967382d8a4d0774d3a0
+  python_build_sha512: aad08af8a163c914671c1b149306061ea93fc1fb5f066dda5a351ddec4b7b374160bf657d30b0eccc498c4f53950307646d792b58cb0efb91975b2541e111d88
 
   # renovate: datasource=github-tags versioning=python depName=pypa/flit
   python_flit_core_version: 3.12.0