docs: update feature status of displayAllHeaders

Author: ulivz

docs/default-theme-config/README.md

@@ -144,7 +144,7 @@ sidebarDepth: 2
 ---
 ```
 
-### Displaying Header Links of All Pages
+### Displaying Header Links of All Pages <Badge text="0.11.0+"/>
 
 The sidebar only displays links for headers in the current active page. You can display all header links for every page with `themeConfig.displayAllHeaders: false`:
 

docs/zh/default-theme-config/README.md

@@ -140,7 +140,7 @@ sidebarDepth: 2
 ---
 ```
 
-### 显示所有页面的标题链接
+### 显示所有页面的标题链接 <Badge text="0.11.0+"/>
 
 默认情况下，侧边栏只会显示由当前活动页面的标题（headers）组成的链接，你可以设置 `themeConfig.displayAllHeaders` 来显示所有页面的标题链接：