Fixed the lost description when using property $description and $signature for hyperf/command. (#4835)

Author: huangdijia

src/Command.php

@@ -93,9 +93,10 @@ public function __construct(string $name = null)
             $this->configureUsingFluentDefinition();
         } else {
             parent::__construct($this->name);
-            ! empty($this->description) && $this->setDescription($this->description);
         }
 
+        ! empty($this->description) && $this->setDescription($this->description);
+
         $this->addDisableDispatcherOption();
     }