Update app.py

app.py

@@ -11,6 +11,10 @@ from haystack.nodes import EmbeddingRetriever
 # from huggingface_hub import login, HfApi, hf_hub_download, InferenceClient
 import openai
 
+
+os.system("pip uninstall -y pydantic")
+os.system('pip install pydantic==1.8.2')
+
 # for local st testing, may need to run source ~/.zshrc to point to env vars
 
 # Get HF token (used for llama2)