Update README.zh.md to fix typo (#1758)

### What this PR does / why we need it?


Update README.zh.md to fix typo

### Does this PR introduce _any_ user-facing change?


No

### How was this patch tested?


CI passed

Signed-off-by: Yikun Jiang <yikunkero@gmail.com>

Author: Yikun

README.zh.md

@@ -20,7 +20,7 @@ vLLM Ascend Plugin
 ---
 *最新消息* 🔥
 
-- [2025/06] [用户案例](https://vllm-ascend.readthedocs.io/en/latest/community/user_stories/index.html)现已上线！展示了[LLaMA-Factory](https://github.com/hiyouga/LLaMA-Factory)/[verl](https://github.com/voidful/verl)/[TRL](https://github.com/huggingface/trl)/[GPUStack](https://github.com/alibaba/GPUStack)等用户案例，展示了vLLM Ascend如何帮助昇腾用户在模型微调、评估、强化学习 (RL) 以及部署等场景中提升体验。
+- [2025/06] [用户案例](https://vllm-ascend.readthedocs.io/en/latest/community/user_stories/index.html)现已上线！展示了LLaMA-Factory/verl/TRL/GPUStack等用户案例，展示了vLLM Ascend如何帮助昇腾用户在模型微调、评估、强化学习 (RL) 以及部署等场景中提升体验。
 - [2025/06] [贡献者](https://vllm-ascend.readthedocs.io/en/latest/community/contributors.html)页面现已上线！所有的贡献都值得被记录，感谢所有的贡献者。
 - [2025/05] 我们发布了首个正式版本 [v0.7.3](https://github.com/vllm-project/vllm-ascend/releases/tag/v0.7.3)！我们与 vLLM 社区合作发布了一篇博客文章，分享了我们的实践：[Introducing vLLM Hardware Plugin, Best Practice from Ascend NPU](https://blog.vllm.ai/2025/05/12/hardware-plugin.html)。
 - [2025/03] 我们和vLLM团队举办了[vLLM Beijing Meetup](https://mp.weixin.qq.com/s/CGDuMoB301Uytnrkc2oyjg)! 你可以在[这里](https://drive.google.com/drive/folders/1Pid6NSFLU43DZRi0EaTcPgXsAzDvbBqF)找到演讲材料.