Setup change for generating page title (#2949)

With the original method, it was not possible to set the page title from definePageMeta as the default title.

docs/content/docs/2.guide/6.seo.md

@@ -82,7 +82,8 @@ const head = useLocaleHead({
   identifierAttribute: 'id',
   addSeoAttributes: true
 })
-const title = computed(() => t('layouts.title', { title: t(route.meta.title ?? 'TBD') }))
+const title = computed(() => t(route.meta.title ?? 'TBD', t('layouts.title'))
+);
 </script>
 
 <template>