chore: code cleanup

src/Entity/Feedback.php

@@ -253,7 +253,7 @@ class Feedback implements BlameableEntityInterface, TimestampableEntityInterface
             $sum += $rating['mark'];
         }
 
-        $this->averageRating = $sum/count($this->ratings) * 100;
+        $this->averageRating = $sum / count($this->ratings) * 100;
 
         return $this;
     }