Merge pull request #859 from nextcloud/backport/855/stable30

[stable30] fix: Add navigation entry by closure

lib/AppInfo/Application.php

@@ -122,7 +122,7 @@ protected function registerNavigation(IServerContainer $container) {
 
 		try {
 			$container->get(INavigationManager::class)
-					  ->add($this->fullTextSearchNavigation());
+					  ->add(fn () => $this->fullTextSearchNavigation());
 		} catch (RouteNotFoundException $e) {
 		}
 	}