Use correct secret

Author: SailReal

.github/workflows/gh-pages.yml

@@ -82,7 +82,7 @@ jobs:
       - name: Deploy to Staging Repository
         uses: peaceiris/actions-gh-pages@v3
         with:
-          deploy_key: ${{ secrets.GITHUB_TOKEN }}
+          deploy_key: ${{ secrets.CRYPTOBOT_DEPLOY_STAGING_WEBSITE }}
           external_repository: cryptomator/staging.cryptomator.org
           publish_dir: ./public
           publish_branch: main