ci: bump actions/create-github-app-token #38436

Bumps the github-actions group with 1 update in the / directory: [actions/create-github-app-token](https://github.com/actions/create-github-app-token).


Updates `actions/create-github-app-token` from 2 to 3
- [Release notes](https://github.com/actions/create-github-app-token/releases)
- [Commits](https://github.com/actions/create-github-app-token/compare/v2...v3)

---
updated-dependencies:
- dependency-name: actions/create-github-app-token
  dependency-version: '3'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
...

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

.github/workflows/backport.yml

@@ -18,7 +18,7 @@ jobs:
         with:
           persist-credentials: true
 
-      - uses: actions/create-github-app-token@v2
+      - uses: actions/create-github-app-token@v3
         id: app-token
         with:
           app-id: ${{ vars.BACKPORT_APP }}