ci: fix GitHub App secret names (#723)

Author: omercnet

.github/workflows/release-please.yml

@@ -20,8 +20,8 @@ jobs:
         id: app-token
         uses: actions/create-github-app-token@d72941d797fd3113feb6b93fd0dec494b13a2547 # v1.12.0
         with:
-          app-id: ${{ secrets.RELEASE_BOT_APP_ID }}
-          private-key: ${{ secrets.RELEASE_BOT_PRIVATE_KEY }}
+          app-id: ${{ secrets.RELEASE_APP_ID }}
+          private-key: ${{ secrets.RELEASE_APP_PEM }}
 
       - uses: googleapis/release-please-action@16a9c90856f42705d54a6fda1823352bdc62cf38 # v4.4.0
         id: release