fix(frontend/pageMetadata): ページタイトルが更新されない問題 (#13289)

Co-authored-by: syuilo <Syuilotan@yahoo.co.jp>
Co-authored-by: syuilo <4439005+syuilo@users.noreply.github.com>

packages/frontend/src/pages/admin-user.vue

@@ -518,10 +518,10 @@ const headerTabs = computed(() => [{
 	icon: 'ti ti-code',
 }]);
 
-definePageMetadata(computed(() => ({
+definePageMetadata(() => ({
 	title: user.value ? acct(user.value) : i18n.ts.userInfo,
 	icon: 'ti ti-user-exclamation',
-})));
+}));
 </script>
 
 <style lang="scss" scoped>