add forgotten md

app.py

@@ -120,4 +120,4 @@ if __name__ == "__main__":
     markdown_description = "# Code to build this app on gradio \n\n"
     markdown_description += "```python\n"+open(__file__, 'r').read()+"```"
     img = Image.load_image("sample.jpg")
-    launch(img, backend=args.backend)
+    launch(img, backend=args.backend, markdown_description=markdown_description)