Update app.py

Tried to correct tools list

app.py

@@ -54,7 +54,7 @@ with open("prompts.yaml", 'r') as stream:
     
 agent = CodeAgent(
     model=model,
-    tools=[final_answer],[my_cat_tool] ## add your tools here (don't remove final answer)
+    tools=[final_answer,my_cat_tool] ## add your tools here (don't remove final answer)
     max_steps=6,
     verbosity_level=1,
     grammar=None,