langchain[patch]: Update unit test (#20228)

This unit test fails likely validation by the openai client.

Newer openai library seems to be doing more validation so the existing
test fails since http_client needs to be of httpx instance

libs/langchain/tests/unit_tests/load/test_load.py

@@ -76,7 +76,7 @@ def test_loads_llmchain_with_non_serializable_arg() -> None:
         model="davinci",
         temperature=0.5,
         openai_api_key="hello",
-        http_client=NotSerializable,
+        model_kwargs={"a": NotSerializable},
     )
     prompt = PromptTemplate.from_template("hello {name}!")
     chain = LLMChain(llm=llm, prompt=prompt)