Fix deploy_docs.yml: Change GITHUB_TOKEN to github_token

Co-authored-by: wannaphong <8536487+wannaphong@users.noreply.github.com>

Author: Copilot

.github/workflows/deploy_docs.yml

@@ -28,7 +28,7 @@ jobs:
     - name: Deploy
       uses: peaceiris/actions-gh-pages@v3
       with:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        github_token: ${{ secrets.GITHUB_TOKEN }}
         publish_dir: ./docs/_build/html
         user_name: 'github-actions[bot]'
         user_email: 'github-actions[bot]@users.noreply.github.com'