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/build-docs.yml

@@ -15,7 +15,7 @@ jobs:
       SPHINX_GITHUB_CHANGELOG_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - uses: actions/setup-python@v6
         with:

.github/workflows/ci.yml

@@ -24,7 +24,7 @@ jobs:
   pre-commit:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - uses: actions/setup-python@v6
       with:
         python-version: '3.12'
@@ -58,7 +58,7 @@ jobs:
     runs-on: ${{ matrix.runs-on }}
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
 
     - uses: actions/setup-python@v6
       with:
@@ -110,7 +110,7 @@ jobs:
     runs-on: ${{ matrix.runs-on }}
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
         # For Linux, the CUDA Toolkit is installed the dockerfile
       - name: Install CUDA Toolkit (Windows)
@@ -236,7 +236,7 @@ jobs:
     runs-on: ${{ matrix.runs-on }}
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python }}
@@ -279,7 +279,7 @@ jobs:
     runs-on: ${{ matrix.runs-on }}
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-python@v6
         with:
           python-version: "3.13"

.github/workflows/docs-manual-versioning.yml

@@ -23,10 +23,10 @@ jobs:
     env:
       SPHINX_GITHUB_CHANGELOG_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         if: inputs.commit == ''
 
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         if: inputs.commit != ''
         with:
           ref: ${{ inputs.commit }}

.github/workflows/docs-versioning.yml

@@ -14,7 +14,7 @@ jobs:
     env:
       SPHINX_GITHUB_CHANGELOG_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - uses: actions/setup-python@v6
         with:

.github/workflows/pypi.yml

@@ -28,7 +28,7 @@ jobs:
     runs-on: ${{ matrix.runs-on }}
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
 
     - name: Set up Docker Buildx
       if: runner.os == 'linux'
@@ -71,7 +71,7 @@ jobs:
 
     steps:
       # create the `ale_py-*.*.*.tar.gz` for source building
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-python@v6
         with:
           python-version: '3.12'