Update app.py

bug fixed comma added

app.py

@@ -89,7 +89,7 @@ with open("prompts.yaml", 'r') as stream:
 agent = CodeAgent(
     model=model,
     tools=[final_answer,image_generation_tool,get_travel_duration], ## add your tools here (don't remove final answer)
-    additional_authorized_imports=["datetime"]
+    additional_authorized_imports=["datetime"],
     max_steps=6,
     verbosity_level=1,
     grammar=None,