chore(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.yml

@@ -13,7 +13,7 @@ jobs:
     if: github.event_name == 'push' || (github.event_name == 'pull_request' && github.event.pull_request.head.repo.fork == true)
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: JohnnyMorganz/stylua-action@v4
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
@@ -32,7 +32,7 @@ jobs:
         nvim-version: [v0.8.3, v0.9.5, v0.10.3, v0.11.2]
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: DeterminateSystems/nix-installer-action@main
       - uses: DeterminateSystems/magic-nix-cache-action@main
       - uses: leafo/gh-actions-lua@v12

.github/workflows/lint-commit.yaml

@@ -19,7 +19,7 @@ jobs:
     name: commitlint
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: amannn/action-semantic-pull-request@v6
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/release.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     name: vimdoc generator
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           token: ${{ secrets.PAT }}
 
@@ -41,7 +41,7 @@ jobs:
     steps:
       - uses: googleapis/release-please-action@v4
         id: release
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: tag stable versions
         if: ${{ steps.release.outputs.release_created }}
         run: |