Update tools/final_answer.py

tools/final_answer.py

@@ -5,7 +5,7 @@ class FinalAnswerTool(Tool):
     name = "final_answer"
     description = "Provides a final answer to the given problem."
     inputs = {'answer': {'type': 'any', 'description': 'The final answer to the problem'}}
-    output_type = "any"
+    output_type = "string"
 
     def forward(self, answer: Any) -> Any:
         return answer