Update app.py

app.py

@@ -7,7 +7,7 @@ from model import create_effnetb2_model
 from timeit import default_timer as timer
 from typing import Tuple,Dict
 
-with open("class_names","r") as f:
+with open("class_names.txt","r") as f:
     class_names=[food_name.strip() for food_name in f.readlines()]
 
 effnetb2, effnetb2_transforms=create_effnetb2_model(