always use get_class instead of ::class because of support for old php versions.

Author: revoltek-daniel

src/EventListener/CronMonitorListener.php

@@ -99,10 +99,6 @@ private function getCommandIndex(?Command $command): string
             return '';
         }
 
-        if (\PHP_VERSION > 8.0) {
-            return $command::class;
-        }
-
         return \get_class($command);
     }
 }