docs: fix correct search option position

docs/src/.vitepress/config.mts

@@ -12,10 +12,10 @@ export default {
     ['link', { rel: 'icon', href: '/logo.png' }],
     ['link', { rel: 'shortcut icon', href: '/favicon.ico' }]
   ],
+  themeConfig: {
     search: {
       provider: 'local'
     },
-  themeConfig: {
     sidebar: generateSidebar({
       root: 'src',
       collapsed: false,