Update app.py

app.py

@@ -50,7 +50,7 @@ llm = ChatGoogleGenerativeAI(
 )
 
 # Initialize embeddings using OpenAI
-embeddings = SentenceTransformer('sentence-transformers/all-MiniLM-L6-v2')
+embeddings = HuggingFaceEmbeddings(model_name="sentence-transformers/all-mpnet-base-v2")
 
 def load_preprocessed_vectorstore():
     try: