Update app.py

app.py

@@ -22,12 +22,12 @@ documents = SimpleDirectoryReader('data').load_data()
 model_kwargs = {'device': 'cpu'}
 encode_kwargs = {'normalize_embeddings': True}
 embed_model = HuggingFaceInstructEmbeddings(
-    model_name="hkunlp/instructor-xl", model_kwargs=model_kwargs,
+    model_name="hkunlp/instructor-large", model_kwargs=model_kwargs,
     encode_kwargs=encode_kwargs 
 ) 
 llm= LLM = G4FLLM(
         model=models.gpt_35_turbo,
-        provider=Provider.Aichat,
+        provider=Provider.ChatForAi,
     )
 
 llm = LangChainLLM(llm=llm)