Update app.py

app.py

@@ -49,7 +49,7 @@ model = AutoModelForCausalLM.from_pretrained(model_id, torch_dtype=torch.float32
 # sentence transformers to be used in vector store
 embeddings = HuggingFaceEmbeddings(
       model_name="sentence-transformers/all-mpnet-base-v2", #Change MR
-      model_kwargs={'device': 'cpu'},
+      model_kwargs={'device': 'auto'}, #Change MR
       encode_kwargs={'normalize_embeddings': False}
   )