fix: correct grammar in search reference page

docs/en/reference/default-theme-search.md

@@ -6,7 +6,7 @@ outline: deep
 
 ## Local Search
 
-VitePress supports fuzzy full-text search using a in-browser index thanks to [minisearch](https://github.com/lucaong/minisearch/). To enable this feature, simply set the `themeConfig.search.provider` option to `'local'` in your `.vitepress/config.ts` file:
+VitePress supports fuzzy full-text search using an in-browser index thanks to [minisearch](https://github.com/lucaong/minisearch/). To enable this feature, simply set the `themeConfig.search.provider` option to `'local'` in your `.vitepress/config.ts` file:
 
 ```ts
 import { defineConfig } from 'vitepress'
@@ -272,7 +272,7 @@ export default defineConfig({
 })
 ```
 
-[These options](https://github.com/vuejs/vitepress/blob/main/types/docsearch.d.ts) can be overridden. Refer official Algolia docs to learn more about them.
+[These options](https://github.com/vuejs/vitepress/blob/main/types/docsearch.d.ts) can be overridden. Refer to the official Algolia docs to learn more about them.
 
 ### Crawler Config