fix content response

frigate/api/event.py

@@ -907,10 +907,12 @@ def set_description(
 
     if new_description is None or len(new_description) == 0:
         return JSONResponse(
-            content={
+            content=(
+                {
                     "success": False,
                     "message": "description cannot be empty",
-            },
+                }
+            ),
             status_code=400,
         )