docs: update file-structure doc (angular#56202)

Replace `/assets` with `public/`, this was replaced in version 18 of the Angular CLI. PR Close angular#56202

Author: alan-agius4

adev/src/content/reference/configs/file-structure.md

@@ -64,7 +64,7 @@ Subfolders contain the application source and application-specific configuration
 | Application support files | Purpose |
 |:--- |:--- |
 | `app/` | Contains the component files in which your application logic and data are defined. See details [below](#app-src). |
-| `assets/` | Contains image and other asset files to be served as static files by the dev server and copied as-is when you build your application. |
+| `public/` | Contains image and other asset files to be served as static files by the dev server and copied as-is when you build your application. |
 | `favicon.ico` | An icon to use for this application in the bookmark bar. |
 | `index.html` | The main HTML page that is served when someone visits your site. The CLI automatically adds all JavaScript and CSS files when building your app, so you typically don't need to add any `<script>` or`<link>` tags here manually. |
 | `main.ts` | The main entry point for your application. |