Update app.py

Again fixed the indentation

app.py

@@ -19,9 +19,9 @@ def my_custom_tool(arg1:str, arg2:int)-> str:
     try:
         name = arg1
         day = arg2
-    return f"Happy Birthday to my dear friend {name}, I wish on this day that is {day} is always on your mind :) "
+        return f"Happy Birthday to my dear friend {name}, I wish on this day that is {day} is always on your mind :) "
     except Exception as e:
-    return f"Error generating text :{str(e)}"
+        return f"Error generating text :{str(e)}"
 @tool
 def get_current_time_in_timezone(timezone: str) -> str:
     """A tool that fetches the current local time in a specified timezone.