ci(action): update actions/create-github-app-token action to v2 (#521)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/update-prettier.yml

@@ -7,7 +7,7 @@ jobs:
   update_prettier:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/create-github-app-token@v1
+      - uses: actions/create-github-app-token@v2
         id: app-token
         with:
           app-id: ${{ vars.OCTOKIT_APP_ID }}