Update CheckUrl.php
Update CheckUrl.php

Fixing the language string for checkUrls slack message
iflamed/deployer,JamesForks/deployer,REBELinBLUE/deployer,REBELinBLUE/deployer,REBELinBLUE/deployer,talib570/deployer,talib570/deployer,JamesForks/deployer,REBELinBLUE/deployer,iflamed/deployer,JamesForks/deployer,JamesForks/deployer