Allow to disable group change notification

Signed-off-by: Marco Ambrosini <marcoambrosini@pm.me>

apps/settings/lib/Activity/GroupSetting.php

@@ -85,7 +85,7 @@ class GroupSetting implements ISetting {
 	 * @since 11.0.0
 	 */
 	public function canChangeMail(): bool {
-		return false;
+		return true;
 	}
 
 	/**