Update app.py

try to fix if statement

app.py

@@ -54,7 +54,7 @@ async def capture_screenshot(image_type: str):
 
         #url = "https://openprocessing.org/sketch/2539973"
         url = "https://editor.p5js.org/kfahn/full/2XD5Y8MiV"
-        image_url
+       
         if image_type: 
             image_url = get_image_url(image_type)
         else: