docs(events): convert docstring to google-style

Signed-off-by: Matej Focko <[email protected]>

packit_service/worker/events/event.py

@@ -494,7 +494,8 @@ def pre_check(self) -> bool:
         Implement this method for those events, where you want to check if event properties are
         correct. If this method returns False during runtime, execution of service code is skipped.
 
-        :return: False if we can ignore the event
+        Returns:
+            `False` when we can ignore the event, `True` otherwise (for handling).
         """
         return True