docs: Update README formatting

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

README.md

@@ -47,7 +47,9 @@ git submodule add https://git.internal.intelligrow.cn/zhangfucai/spec-coding-ski
 # 创建符号链接
 mkdir -p .claude
 ln -s ../.spec-coding-skills/.claude/skills .claude/skills
+```
 
+```bash
 # 提交变更
 git add .gitmodules .spec-coding-skills .claude/skills
 git commit -m "Add spec-coding-skills as submodule"
@@ -74,8 +76,6 @@ rm -rf /tmp/spec-coding-skills
 ```bash
 # 更新到最新版本
 git submodule update --remote .spec-coding-skills
-git add .spec-coding-skills
-git commit -m "Update spec-coding-skills"
 ```
 
 ### 直接复制方式