Update app.py

app.py

@@ -3,13 +3,13 @@ import re
 import gradio as gr
 from langchain.prompts import PromptTemplate
 from langchain_openai import ChatOpenAI
-from langchain.vectorstores import Chroma
+from langchain_chroma import Chroma
 from langchain.embeddings import HuggingFaceEmbeddings
 
 # Load embedding model and vector store from persisted DB
 embedding_model = HuggingFaceEmbeddings(model_name="sentence-transformers/all-MiniLM-L6-v2")
 vector_store = Chroma(
-    embedding=embedding_model,
+    embedding_function=embedding_model,
     persist_directory="geometry_db",  # relative folder inside your Hugging Face Space
     collection_name="geometry_sol"
 )