Update app.py

app.py

@@ -135,7 +135,7 @@ async def chat(query,history,sources,reports,subtype,year):
     question_lst= [query]
     for question in question_lst:
         retriever = vectorstore.as_retriever(
-          search_type="similarity_score_threshold", search_kwargs={"score_threshold": 0.6, "k": 3, filter=filter})
+          search_type="similarity_score_threshold", search_kwargs={"score_threshold": 0.6, "k": 3, "filter":filter})
         
         context_retrieved = retriever.invoke(question)