Harrison/prediction guard update (#5404)

Co-authored-by: Daniel Whitenack <whitenack.daniel@gmail.com>

tests/integration_tests/llms/test_predictionguard.py

@@ -5,6 +5,6 @@ from langchain.llms.predictionguard import PredictionGuard
 
 def test_predictionguard_call() -> None:
     """Test valid call to prediction guard."""
-    llm = PredictionGuard(name="default-text-gen")
+    llm = PredictionGuard(model="OpenAI-text-davinci-003")
     output = llm("Say foo:")
     assert isinstance(output, str)