Fixing spelling error among all services

src/send_notification.py

@@ -29,7 +29,7 @@ def send_notification(title: str, chapter_title: str,link: str,max_retries: int
 	}
 
 	data = {
-		"receipent_user_id": 1,
+		"user_id": 1,
 		"message": {
 			"title": title,
 			"body": chapter_title,