chore(deps): update actions/create-github-app-token action to v3

Author: renovate[bot]

.github/workflows/update.yml

@@ -17,7 +17,7 @@ jobs:
     steps:
       - name: Generate GitHub App token
         id: app-token
-        uses: actions/create-github-app-token@v2
+        uses: actions/create-github-app-token@v3
         with:
           app-id: ${{ vars.PR_APP_ID }}
           private-key: ${{ secrets.PR_APP_PRIVATE_KEY }}