Bump actions/checkout from 5 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 5 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -221,7 +221,7 @@ jobs:
     runs-on: ${{ matrix.container }}
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
 
@@ -620,7 +620,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
 
@@ -672,7 +672,7 @@ jobs:
     if: needs.prereqs.outputs.DO_HW_TESTS == 'true'
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
 
@@ -721,7 +721,7 @@ jobs:
         run: |
           echo raspberry_pi_artifact=toit-rpi.tar.gz >> $GITHUB_OUTPUT
 
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
 
@@ -1058,7 +1058,7 @@ jobs:
     if: needs.prereqs.outputs.RUN_WINDOWS_SIGN_FLOW == 'true'
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Install dependencies
         shell: powershell
@@ -1156,7 +1156,7 @@ jobs:
     if: needs.prereqs.outputs.RUN_MACOS_SIGN_FLOW == 'true'
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Install dependencies
         run: |
@@ -1350,7 +1350,7 @@ jobs:
     steps:
       # This shouldn't be necessary, but the archlinux-package-action
       # doesn't work without it.
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Ssh
         env:
@@ -1411,7 +1411,7 @@ jobs:
         run: |
           rm -rf ${{ github.workspace }}/*
 
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       # We need a more recent version of cmake than is installed globally.
       - name: Add local bin to PATH

.github/workflows/tar-ball.yml

@@ -29,7 +29,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository without submodules
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           submodules: false
           fetch-depth: 0  # Fetch all history so the archive has correct metadata.
@@ -238,7 +238,7 @@ jobs:
     steps:
       # This shouldn't be necessary, but the archlinux-package-action
       # doesn't work without it.
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Ssh
         env: