fix: Localize ok cancel alert dialogs

lib/views/settings_3pid.dart

@@ -76,6 +76,8 @@ class _Settings3PidState extends State<Settings3Pid> {
     if (await showOkCancelAlertDialog(
           context: context,
           title: L10n.of(context).areYouSure,
+          okLabel: L10n.of(context).yes,
+          cancelLabel: L10n.of(context).cancel,
         ) !=
         OkCancelResult.ok) {
       return;