fix the searchtool error

app.py

@@ -28,9 +28,9 @@ def search_tool(query:str, num_results:int = 3)-> str: #it's import to specify t
         formatted_results = [] 
         for i, result in enumerate(results,1):
             formatted_results.append(
-                f"{i}. Title: {result.title}\n"
-                f" snippet: {result.snippet}\n"
-                f" URL:{result.link}\n"
+                f"{i}. Title: {result['title']}\n"
+                f" snippet: {result['snippet']}\n"
+                f" URL:{result['link']}\n"
             )
 
             #combine results into a single string