Bump actions/checkout from 2 to 4 (#74356)

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v2...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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/bump-version.yml

@@ -39,7 +39,7 @@ jobs:
           example: 7.4.3, 7.4.3-preview or 7.4.3-preview1"
           exit 1
 
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Set intermedia variables
         id: intermedia
@@ -50,7 +50,7 @@ jobs:
           echo "branch_exist=$(git ls-remote --heads https://github.com/grafana/grafana.git v${{ steps.regex-match.outputs.group1 }}.x | wc -l)" >> $GITHUB_OUTPUT
 
       - name: Checkout Actions
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           repository: "grafana/grafana-github-actions"
           path: ./actions