build(deps): bump actions/checkout from 4 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4...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] <support@github.com>

Author: dependabot[bot]

.github/workflows/build.yml

@@ -90,7 +90,7 @@ jobs:
         shell: sh
 
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Set up D (Linux)
         if: runner.os == 'Linux'
@@ -140,7 +140,7 @@ jobs:
       TAG_NAME: latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Download artifacts
         uses: actions/download-artifact@v5

.github/workflows/container.yml

@@ -23,7 +23,7 @@ jobs:
     runs-on: ${{ matrix.image }}
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Build image
         run: docker build -t $IMAGE_NAME:latest-${{ matrix.arch }} .

.github/workflows/libraries.yml

@@ -19,7 +19,7 @@ jobs:
         arch: [x86, x64, arm64]
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Remove old import libraries
         run: Remove-Item -Path lib\*.lib
@@ -49,7 +49,7 @@ jobs:
       contents: write
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Download import libraries
         uses: actions/download-artifact@v5

.github/workflows/lint.yml

@@ -11,7 +11,7 @@ jobs:
     timeout-minutes: 15
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Set up D
         uses: dlang-community/setup-dlang@v2

.github/workflows/reuse.yml

@@ -11,7 +11,7 @@ jobs:
     timeout-minutes: 15
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Set up cache
         uses: actions/cache@v4