ci(update): use app token

Author: gr2m

.github/workflows/update.yml

@@ -44,7 +44,7 @@ jobs:
       - name: update schema.json
         uses: gr2m/create-or-update-pull-request-action@v1.x
         env:
-          GITHUB_TOKEN: ${{ secrets.OCTOKITBOT_PAT }}
+          GITHUB_TOKEN: ${{ steps.app-token.outputs.token }}
         with:
           branch: schema-update
           author: Octokit Bot <octokitbot@martynus.net>