Bump actions/checkout from 3 to 4 (#439)

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v4)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/CI.yml

@@ -23,28 +23,28 @@ jobs:
       matrix:
         os: [macos-latest, ubuntu-latest]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: fish-actions/install-fish@v1
       - run: make test -C "$GITHUB_WORKSPACE"
 
   syntax-check:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: fish-actions/install-fish@v1
       - uses: fish-actions/syntax-check@v1
 
   format-check:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: fish-actions/install-fish@v1
       - uses: fish-actions/format-check@v1
 
   mega-linter:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: oxsecurity/megalinter/flavors/documentation@v7
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/release.yml

@@ -13,7 +13,7 @@ jobs:
   release:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Create higher level tags
         uses: vweevers/additional-tags-action@v2