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

Author: renovate[bot]

.github/workflows/upstream.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: ${{ secrets.APP_ID }}
                   private-key: ${{ secrets.APP_PRIVATE_KEY }}