update app.py

app.py

@@ -17,7 +17,7 @@ def generate_shadow_soldier(description: str)-> str:
         image_url = image_generation_tool.generate_image(description)
         return f"Here is your shadow soldier picture: {image_url}"
     except Exception as e:
-        return f"Error generating shadow soldier picture: {str(e)}""
+        return f"Error generating shadow soldier picture: {str(e)}"
 
 @tool
 def get_current_time_in_timezone(timezone: str) -> str: