chore(CI): bump actions/checkout from 5 to 6 in the actions group

Bumps the actions group with 1 update: [actions/checkout](https://github.com/actions/checkout).


Updates `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
  dependency-group: actions
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/codespell.yml

@@ -18,7 +18,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Annotate locations with typos
         uses: codespell-project/codespell-problem-matcher@v1
       - name: Codespell

.github/workflows/lint.yml

@@ -14,7 +14,7 @@ jobs:
 
     steps:
     - name: Checkout pygit2
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
 
     - name: Set up Python
       uses: actions/setup-python@v6

.github/workflows/tests.yml

@@ -14,7 +14,7 @@ jobs:
     if: github.ref == 'refs/heads/master'
     steps:
     - name: Checkout
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
 
     - name: Build & test
       uses: uraimo/run-on-arch-action@v3

.github/workflows/wheels.yml

@@ -36,7 +36,7 @@ jobs:
           os: windows-11-arm
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           # avoid leaking credentials in uploaded artifacts
           persist-credentials: false
@@ -63,7 +63,7 @@ jobs:
     runs-on: ubuntu-24.04
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           # avoid leaking credentials in uploaded artifacts
           persist-credentials: false
@@ -95,7 +95,7 @@ jobs:
     outputs:
       release_title: ${{ steps.parse_changelog.outputs.release_title }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           # avoid leaking credentials in uploaded artifacts
           persist-credentials: false