fix: pincode functionality

lib/utils/app_updater.dart

@@ -1,3 +1,5 @@
+import 'dart:io';
+
 import 'package:flutter/material.dart';
 import 'package:kooltab2/utils/app_update_util.dart';
 import 'package:ota_update/ota_update.dart';
@@ -8,6 +10,7 @@ class UpdateChecker {
   static bool _hasChecked = false;
 
   static Future<void> check(BuildContext context) async {
+    if (!Platform.isAndroid) return;
     if (_hasChecked) {
       debugPrint("Update already checked this boot");
       return;