[docs] Fixed typo 'site-repl' -> 'svelte-repl', with minor change to a sentence's structure (#6498)

(used to look like a list of 4, when really it's a list of 2).

site/README.md

@@ -54,9 +54,9 @@ To build the website, run `npm run build`. The output can be found in `__sapper_
 Tests can be run using `npm run test`.
 
 
-## Linking `@sveltejs/site-kit` and `@sveltejs/site-repl`
+## Linking `@sveltejs/site-kit` and `@sveltejs/svelte-repl`
 
-This site depends on `@sveltejs/site-kit`, a collection of styles, components and icons used in common by *.svelte.dev websites, and `@sveltejs/site-repl`.
+This site depends on `@sveltejs/site-kit` (a collection of styles, components and icons used in common by *.svelte.dev websites), and `@sveltejs/svelte-repl`.
 
 In order to work on features that depend on those packages, you need to [link](https://docs.npmjs.com/cli/link) their repositories: