⬆ 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/lint.yml

@@ -25,7 +25,7 @@ jobs:
         python-version: [ '3.9', '3.14' ]
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v6
         with:

.github/workflows/release.yml

@@ -39,7 +39,7 @@ jobs:
       PACKAGE_NAME: ${{ steps.set-package.outputs.package_name }}
       RELEASE_VERSION: ${{ steps.set-package.outputs.release_version }}
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Set up Python
       uses: actions/setup-python@v6
       with:

.github/workflows/scorecard.yml

@@ -20,7 +20,7 @@ jobs:
 
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           persist-credentials: false
 

.github/workflows/test.yml

@@ -36,7 +36,7 @@ jobs:
       if: ${{ github.event.inputs.clear_cache == 'true' }}
       run: sudo rm -rf /opt/hostedtoolcache
 
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Set up Python ${{ matrix.python-version }}
       id: sp
       uses: actions/setup-python@v6
@@ -92,7 +92,7 @@ jobs:
       if: ${{ github.event.inputs.clear_cache == 'true' }}
       run: sudo rm -rf /Users/runner/hostedtoolcache
 
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Set up Python ${{ matrix.python-version }}
       id: sp
       uses: actions/setup-python@v6
@@ -147,7 +147,7 @@ jobs:
     - name: Clear GitHub Actions cache
       if: ${{ github.event.inputs.clear_cache == 'true' }}
       run: Remove-Item -Recurse -Force C:\hostedtoolcache
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Set up Python ${{ matrix.python-version }}
       id: sp
       uses: actions/setup-python@v6
@@ -191,7 +191,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-python@v6
         id: sp
         with: