Update app.py

app.py

@@ -95,7 +95,7 @@ response = requests.get(url)
 with open(local_filename, 'wb') as f:
     f.write(response.content)
 '''
-model = keras.layers.TFSMLayer('/my_model', call_endpoint='serving_default')
+model = tf.keras.layers.TFSMLayer('/my_model', call_endpoint='serving_default')