Update app.py

Fixed the network architecture name

app.py

@@ -14,7 +14,7 @@ from pytorch_grad_cam import GradCAM
 from pytorch_grad_cam.utils.image import show_cam_on_image
 from pytorch_grad_cam.utils.model_targets import ClassifierOutputTarget
 
-from custom_resnet_model.model import custResNet
+from model import custResNet
 
 classes = {0: 'airplane',
            1: 'automobile',