Bump actions/checkout from 3 to 4 (#286)

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>

Author: dependabot[bot]

.github/workflows/antsibull-build.yml

@@ -22,21 +22,21 @@ jobs:
 
     steps:
       - name: Check out antsibull
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           repository: ansible-community/antsibull
           ref: main
           path: antsibull
 
       - name: Check out antsibull-core
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           repository: ansible-community/antsibull-core
           ref: main
           path: antsibull-core
 
       - name: Check out antsibull-changelog
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           repository: ansible-community/antsibull-changelog
           ref: main
@@ -47,7 +47,7 @@ jobs:
 
       # This is where the antsibull build-release role expects it by default
       - name: Check out ansible-build-data under antsibull build directory
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: antsibull/build/ansible-build-data