Merge pull request #2841 from nextcloud/backport/2827/stable34

[stable34] fix: enhance member level update validation

Author: cristianscheid

lib/Controller/LocalController.php

@@ -341,7 +341,7 @@ public function memberLevel(string $circleId, string $memberId, $level): DataRes
 			$this->setCurrentFederatedUser();
 
 			$memberUser = $this->permissionService->userMustBeMember($this->userSession->getUser()->getUID(), $circleId);
-			$this->permissionService->memberMustBeAtLeastModerator($memberUser);
+			$this->permissionService->memberMustBeAtLeastAdmin($memberUser);
 
 			if (is_int($level)) {
 				$level = Member::parseLevelInt($level);