i18n(pt): Define algolia PT search locale in `config/shared.ts`

docs/.vitepress/config/shared.ts

@@ -1,5 +1,6 @@
 import { defineConfig } from 'vitepress'
 import { search as zhSearch } from './zh'
+import { search as ptSearch } from './pt'
 
 export const shared = defineConfig({
   title: 'VitePress',
@@ -51,7 +52,7 @@ export const shared = defineConfig({
         appId: '8J64VVRP8K',
         apiKey: 'a18e2f4cc5665f6602c5631fd868adfd',
         indexName: 'vitepress',
-        locales: { ...zhSearch }
+        locales: { ...zhSearch, ...ptSearch }
       }
     },