update endopoints

backend/rooms.py

@@ -246,7 +246,7 @@ def leave_room(room_id, user_id):
     )
 
 def change_room_name(room_id, new_name, user_id):
-    room = execute(
+    room = fetch_one(
         """
         SELECT id
         FROM rooms
@@ -264,7 +264,7 @@ def change_room_name(room_id, new_name, user_id):
     execute(
         """
         UPDATE rooms
-        SET room_name = ?
+        SET name = ?
         WHERE id = ?
         """,
         (