Apply suggestions from code review

Co-authored-by: Turiiya <34311583+ttytm@users.noreply.github.com>

Author: jarda-svoboda

README.md

@@ -100,11 +100,11 @@ export const load = async ({ url }) => {
   import { t } from '$lib/translations';
 </script>
 
-<h1>{$t('greeting', { name: 'World' })}</h1>
+<h1>{$t('common.greeting', { name: 'World' })}</h1>
 
 <nav>
-  <a href="/">{$t('nav.home')}</a>
-  <a href="/about">{$t('nav.about')}</a>
+  <a href="/">{$t('common.nav.home')}</a>
+  <a href="/about">{$t('common.nav.about')}</a>
 </nav>
 ```