docs: back top

Author: Przeblysk

docs/en/api/config-theme.mdx

@@ -304,6 +304,20 @@ export default defineConfig({
 
 ## backTop
 
+:::tip
+To enable the back top, you need to install dependencies `@iconify-json/carbon`
+
+```bash
+# npm
+npm install @iconify-json/carbon -D
+# yarn
+yarn add @iconify-json/carbon -D
+# pnpm
+pnpm add @iconify-json/carbon -D
+```
+
+:::
+
 - Typs: `boolean`
 - Default: `true`
 

docs/zh/api/config-theme.mdx

@@ -296,6 +296,20 @@ export default defineConfig({
 
 ## backTop
 
+:::tip
+开启返回顶部功能需要安装依赖`@iconify-json/carbon`
+
+```bash
+# npm
+npm install @iconify-json/carbon -D
+# yarn
+yarn add @iconify-json/carbon -D
+# pnpm
+pnpm add @iconify-json/carbon -D
+```
+
+:::
+
 - Typs: `boolean`
 - Default: `true`