Update app.py

app.py

@@ -79,7 +79,7 @@ def get_vectorstore(text_chunks):
         A FAISS vector store containing the embeddings of the text chunks.
 
     """
-    model = "BAAI/bge-base-en-v1.5"
+    model = "sentence-transformers/all-mpnet-base-v2"
     encode_kwargs = {
         "normalize_embeddings": True
     }  # set True to compute cosine similarity