Chore(deps): Bump actions/checkout from 4 to 5 (#110558)

* Chore(deps): Bump actions/checkout from 4 to 5

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 5.
- [Release notes](https://github.com/actions/checkout/releases)
- [Commits](https://github.com/actions/checkout/compare/v4...v5)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

* remove incorrect comments

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Ashley Harrison <ashley.harrison@grafana.com>

.github/workflows/release-pr.yml

@@ -118,14 +118,14 @@ jobs:
           permissions: "{\"contents\": \"write\", \"pull_requests\": \"write\", \"workflows\":\"write\"}"
       - run: echo "RELEASE_BRANCH=release-${VERSION}" >> "$GITHUB_ENV"
       - name: Checkout Grafana
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           token: ${{ steps.generate_changelog_token.outputs.token }}
           ref: ${{ env.RELEASE_BRANCH }}
           fetch-tags: true
           fetch-depth: 0
       - name: Checkout Grafana (main)
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           token: ${{ steps.generate_changelog_token.outputs.token }}
           ref: main