Bump actions/create-github-app-token from 2.2.0 to 2.2.1 (#2894)

Bumps [actions/create-github-app-token](https://github.com/actions/create-github-app-token) from 2.2.0 to 2.2.1.
- [Release notes](https://github.com/actions/create-github-app-token/releases)
- [Commits](actions/create-github-app-token@7e473ef...29824e6)

---
updated-dependencies:
- dependency-name: actions/create-github-app-token
  dependency-version: 2.2.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

.github/workflows/backport.yml

@@ -25,7 +25,7 @@ jobs:
         )
       )
     steps:
-      - uses: actions/create-github-app-token@7e473efe3cb98aa54f8d4bac15400b15fad77d94 # v2.2.0
+      - uses: actions/create-github-app-token@29824e69f54612133e76f7eaac726eef6c875baf # v2.2.1
         id: app-token
         with:
           app-id: ${{ vars.BACKPORT_APP_ID }}