Include date in commit message of mirrow workflow

Author: bonigarcia

.github/workflows/mirror-selenium-releases.yml

@@ -26,7 +26,7 @@ jobs:
           git config --local user.email "[email protected]"
           git config --local user.name "Selenium CI Bot"        
           git add common/mirror/selenium
-          git commit -m "Update mirror info" -a
+          git commit -m "Update mirror info (`date`)" -a
           echo "::set-output name=commit::true"
         fi
     - name: Push changes