Update app.py

try to fix if statement

app.py

@@ -55,8 +55,8 @@ 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()
+        if image_type: 
+            image_url = get_image_url(image_type)
         elif:
             image_url = url
         else: