Use better example urls

Signed-off-by: Joas Schilling <coding@schilljs.com>

templates/admin.php

@@ -20,7 +20,7 @@ foreach ($_['groups'] as $group) {
 	<input type="text" id="allowed_domains" name="allowed_domains" value=<?php p($_['allowed']);?>>
 	</p>
 	<p>
-	<em><?php p($l->t('Enter a semicolon-separated list of allowed domains. Example: owncloud.com;github.com'));?></em>
+	<em><?php p($l->t('Enter a semicolon-separated list of allowed domains. Example: nextcloud.com;example.com'));?></em>
 	</p>
 
 	<p>