Update app.py

app.py

@@ -62,7 +62,8 @@ def grab_image():
     This function sends uses Playwright to launch a headless server and grab a screenshot of a p5.js sketch.
 
     Returns:
-        PIL.Image: Captured image
+        Returns:
+        image: the screen shot of the p5.js sketch as an image
     """
     print("Running async Playwright screenshot...")