build(deps): 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-docs.yml

@@ -11,7 +11,7 @@ jobs:
   docs-src:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-python@v6
         with:
           python-version: '3.9'

.github/workflows/CI-sample.yml

@@ -21,7 +21,7 @@ jobs:
         os: [macos-latest, ubuntu-latest, windows-latest]
     runs-on: ${{matrix.os}}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: setup
         run: cmake -E make_directory ${{runner.workspace}}/libuv/docs/code/build
       - name: configure

.github/workflows/CI-unix.yml

@@ -17,7 +17,7 @@ jobs:
   build-linux:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: configure
         run: |
           ./autogen.sh
@@ -32,7 +32,7 @@ jobs:
     env:
       ANDROID_AVD_HOME: /root/.android/avd
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Envinfo
         run: npx envinfo
       - name: Enable KVM
@@ -82,7 +82,7 @@ jobs:
       matrix:
         os: [macos-13, macos-14]
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Envinfo
         run: npx envinfo
       - name: Disable Firewall
@@ -124,7 +124,7 @@ jobs:
       matrix:
         os: [macos-13, macos-14]
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Configure
         run: |
           cmake -B build-ios -GXcode -DCMAKE_SYSTEM_NAME:STRING=iOS -DCMAKE_XCODE_ATTRIBUTE_CODE_SIGNING_ALLOWED:BOOL=NO -DCMAKE_CONFIGURATION_TYPES:STRING=Release
@@ -159,7 +159,7 @@ jobs:
           - {target: ppc64 (u64 slots),   toolchain: gcc-powerpc64-linux-gnu,     cc: powerpc64-linux-gnu-gcc,    qemu: qemu-ppc64    }
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Install qemu and ${{ matrix.config.toolchain }}
         run: |
           sudo apt update

.github/workflows/CI-win.yml

@@ -28,7 +28,7 @@ jobs:
           - {toolchain: Visual Studio 17 2022, arch: arm64, server: 2022}
           - {toolchain: Visual Studio 17 2022, arch: x64, server: 2025}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Build
         run:
           cmake -S . -B build -DBUILD_TESTING=ON
@@ -79,7 +79,7 @@ jobs:
           - {arch: i686,   server: 2022, libgcc: dw2 }
           - {arch: x86_64, server: 2022, libgcc: seh }
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Install mingw32 environment
         run: |
           sudo apt update

.github/workflows/sanitizer.yml

@@ -27,7 +27,7 @@ jobs:
           - name: UBSAN
             flags: -DUBSAN=ON -DCMAKE_BUILD_TYPE=Debug -DCMAKE_C_COMPILER=clang
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Setup
         run: |
           sudo apt-get install ninja-build
@@ -66,7 +66,7 @@ jobs:
           - name: UBSAN
             flags: -DUBSAN=ON -DCMAKE_BUILD_TYPE=Debug
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Envinfo
         run: npx envinfo
@@ -81,7 +81,7 @@ jobs:
   sanitizers-windows:
     runs-on: windows-2022
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Setup
         run: |
           choco install ninja