Update app.py

app.py

@@ -219,8 +219,8 @@ def load_models_and_documents():
             [
                 EngineArgs(
                     model_name_or_path='mixedbread-ai/mxbai-embed-large-v1', 
-                    engine='torch',
-                    device='cuda',
+                    engine='optimum',
+                    device='cpu',
                     embedding_dtype='float32',
                     dtype='float16',
                     pooling_method='cls',