fix config.ts file

Author: Abdelaziz18003

.vitepress/config.ts

@@ -1,7 +1,8 @@
+import fs from 'fs'
+import path from 'path'
+import { defineConfigWithTheme } from 'vitepress'
 import type { Config as ThemeConfig } from '@vue/theme'
 import baseConfig from '@vue/theme/config'
-import { defineConfigWithTheme } from 'vitepress'
-import fs from 'fs'
 import { headerPlugin } from './headerMdPlugin'
 
 const nav: ThemeConfig['nav'] = [