chore: setup github app identity (#494)

Author: nirinchev

.github/workflows/update-cidrs.yaml

@@ -11,7 +11,7 @@ jobs:
     name: Update automatically generated files
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/create-github-app-token@v1
+      - uses: mongodb-js/devtools-shared/actions/setup-bot-token@main
         id: app-token
         with:
           app-id: ${{ vars.DEVTOOLS_BOT_APP_ID }}