docs: fix grammar in directory-structure.md (#2310)

packages/docs/docs/guide/directory-structure.md

@@ -54,7 +54,7 @@ When customizing `templates/ssr.html`, or `templates/dev.html`, it’s best to e
 
 ## Default Page Routing
 
-Here we take `docs` directory as the `targetDir` (See [Command-line Interface](../api/cli.md#usage)), and all the "Relative Path" below are relative to `docs` directory. Add `scripts` in `package.json` that located in the project root directory:
+Here we take `docs` directory as the `targetDir` (See [Command-line Interface](../api/cli.md#usage)), and all the "Relative Path" below are relative to `docs` directory. Add `scripts` in `package.json` which is located in the project root directory:
 
 ```json
 {