Merge pull request #8692 from nextcloud/stable12-add-missing-import

[stable12] Add missing import

Author: MorrisJobke

lib/private/App/AppStore/Fetcher/Fetcher.php

@@ -30,6 +30,7 @@
 use OCP\Http\Client\IClientService;
 use OCP\IConfig;
 use OCP\ILogger;
+use OCP\Util;
 
 abstract class Fetcher {
 	const INVALIDATE_AFTER_SECONDS = 300;