changed torch device to cpu

src/core/embedding.py

@@ -51,7 +51,7 @@ def embed_files(
     files: List[File], embedding: str, vector_store: str, **kwargs
 ) -> FolderIndex:
     model_name = "BAAI/bge-small-en"
-    model_kwargs = {'device': 'mps'}
+    model_kwargs = {'device': 'cpu'}
     encode_kwargs = {'normalize_embeddings': True} # set True to compute cosine similarity
     model_norm = HuggingFaceBgeEmbeddings(
         model_name=model_name,