Update app.py

This change is needed in order to successfully run on a GPU

app.py

@@ -9,7 +9,7 @@ def transcribe(audio_file):
 
 
     if torch.cuda.is_available():
-        device = "gpu"
+        device = "cuda"
     else:
         device = "cpu"
     batch_size = 16 # reduce if low on GPU mem