Bump actions/checkout from 3 to 4

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] <support@github.com>

.github/workflows/common-files-maven-sync.yml

@@ -29,7 +29,7 @@ jobs:
     concurrency: repo-sync-${{ matrix.repo }}
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: slawekjaranowski/github-action-file-sync@master
         with:

.github/workflows/common-files-sync.yml

@@ -31,7 +31,7 @@ jobs:
     concurrency: repo-sync-${{ matrix.repo }}
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: slawekjaranowski/github-action-file-sync@master
         with:

.github/workflows/labels-sync.yml

@@ -33,7 +33,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Sync
         uses: micnncim/action-label-syncer@v1.3.0