Revert "Bump tibdex/github-app-token from 1 to 2" (#8702)

Revert "Bump tibdex/github-app-token from 1 to 2 (#8477)"

This reverts commit 2d621fe.

Author: MarkEWaite

.github/workflows/changelog.yml

@@ -44,7 +44,7 @@ jobs:
     runs-on: ubuntu-latest
     if: github.repository_owner == 'jenkinsci'
     steps:
-      - uses: tibdex/github-app-token@v2
+      - uses: tibdex/github-app-token@v1
         id: generate-token
         with:
           app_id: ${{ secrets.JENKINS_CHANGELOG_UPDATER_APP_ID }}