Update dataset_release.md (#3492)

Author: merrymercy

docs/dataset_release.md

@@ -2,5 +2,6 @@
 We release the following datasets based on our projects and websites.
 
 - [LMSYS-Chat-1M: A Large-Scale Real-World LLM Conversation Dataset](https://huggingface.co/datasets/lmsys/lmsys-chat-1m)
+- [LMSYS-Human-Preference-55k](lmsys/lmsys-arena-human-preference-55k)
 - [Chatbot Arena Conversation Dataset](https://huggingface.co/datasets/lmsys/chatbot_arena_conversations)
 - [MT-bench Human Annotation Dataset](https://huggingface.co/datasets/lmsys/mt_bench_human_judgments)