Update app.py

app.py

@@ -165,7 +165,7 @@ def initialize_chatbot(vector_db, embeddings):
     - Do NOT attempt to answer from general knowledge."""
     
     llm = HuggingFaceEndpoint(
-        repo_id="openai-community/gpt2",
+        repo_id="mistralai/Mistral-7B-Instruct-v0.3",
         huggingfacehub_api_token=os.environ.get("HUGGINGFACE_API_TOKEN"),
         temperature=0.1,
         max_new_tokens=400,