Spring-ai Select text-generation-inferenc support LLMs

Now huggingface text-generation-inference only support Llama, Falcon, StarCoder, BLOOM, GPT-NeoX, and T5. If you select other LLMs, use HuggingfaceChatClient will get errors.

Yesterday, I use gpt2 model, and I use HuggingfaceChatClient get a lot of errors. So I think add a tip for novice will be friendly.

Comment From: markpollack

Thanks for pointing this out, I've updated the text a bit. Merged in 7801119a9244909e0f9825cc02f6122d101d9fc5