Added GPG Key info to sign off on bot actions

.github/workflows/update-submodule-files.yml

@@ -25,14 +25,21 @@ jobs:
         with:
           python-version: '3.x'
 
+      - name: Import GPG key
+        run: |
+          echo "${{ secrets.GPG_PRIVATE_KEY }}" | gpg --batch --import
+          echo "${{ secrets.GPG_PASSPHRASE }}" | gpg --batch --yes --passphrase-fd 0 --pinentry-mode loopback --edit-key F768450FB05B817D0B4BC26FB9B6A9B428C8676A trust quit
+
       - name: Run update script
         run: python update_repo.py
 
       - name: Commit and push changes
         run: |
           git config --global user.name 'github-actions[bot]'
-          git config --global user.email 'github-actions[bot]@users.noreply.github.com'
+          git config --global user.email '[email protected]'
+          git config --global user.signingkey F768450FB05B817D0B4BC26FB9B6A9B428C8676A
+          git config --global commit.gpgSign true
           git add .
-          git commit -m "Update files based on submodule changes"
+          git commit -m "Update files based on submodule changes" -S
           git pull --rebase origin ${{ github.event.pull_request.head.ref }}
           git push origin HEAD:${{ github.event.pull_request.head.ref }}