chore(deps): 降级 sass-embedded 版本依赖

- 将 sass-embedded 版本从 ^1.87.0 改为 ~1.80.0
- 限制依赖版本范围以保证兼容性
- 更新 package.json 中的 devDependencies 配置

package.json

@@ -14,7 +14,7 @@
   "devDependencies": {
     "@vuepress/bundler-vite": "2.0.0-rc.22",
     "@vuepress/plugin-git": "^2.0.0-rc.99",
-    "sass-embedded": "^1.87.0",
+    "sass-embedded": "~1.80.0",
     "vue": "^3.5.13",
     "vuepress": "2.0.0-rc.22",
     "vuepress-theme-hope": "2.0.0-rc.85"