Fixed formatting in agent_notification_activity.py

Author: abdulanu0

libraries/microsoft-agents-a365-notifications/microsoft_agents_a365/notifications/models/agent_notification_activity.py

@@ -21,7 +21,7 @@ def __init__(self, activity: Activity):
         entities = self.activity.entities or []
         for ent in entities:
             etype = ent.type.lower()
-            
+
             # Get the entity payload - check for properties attribute or convert to dict
             if hasattr(ent, "properties"):
                 payload = ent.properties