Update app.py

app.py

@@ -5,7 +5,7 @@ def install(package):
     subprocess.check_call([sys.executable, "-m", "pip", "install", package])
 
 # Install required libraries
-for package in ["litellm", "gradio", "datasets", "rank_bm25", "sentence-transformers"]:
+for package in ["litellm", "gradio", "datasets", "rank_bm25", "sentence-transformers","typing"]:
     try:
         __import__(package)
     except ImportError: