Update utills.py

utills.py

@@ -84,7 +84,7 @@ def chroma_db(docs, _embeddings):
         return None  # or handle the error in an appropriate manner
 
 @st.cache_resource
-def retriever_from_chroma(vectordb, search_type, k):
+def retriever_from_chroma(vectordb, _search_type, k):
     retriever = vectordb.as_retriever(search_type=search_type, search_kwargs={"k": k})
     return retriever