fix: stepper submission data

lib/features/auth/registration/viewmodel/submission_data_viewmodel.dart

@@ -2,7 +2,8 @@ import 'package:camera/camera.dart';
 import 'package:flutter/material.dart';
 
 class SubmissionDataViewModel extends ChangeNotifier {
-  int currentStep = 1;
+  static int _currentStep = 1;
+  int get getCurrentStep => _currentStep;
   int stepAmount = 9;
   bool _isEmailVerify = false;
   bool get isEmailVerify => _isEmailVerify;
@@ -19,8 +20,8 @@ class SubmissionDataViewModel extends ChangeNotifier {
   }
 
   onWillPopSubmission(BuildContext context) {
-    if (currentStep != 1) {
-      currentStep--;
+    if (getCurrentStep != 1) {
+      _currentStep--;
       notifyListeners();
     } else {
       Navigator.of(context).pop(true);
@@ -28,8 +29,8 @@ class SubmissionDataViewModel extends ChangeNotifier {
   }
 
   nextSubmission(BuildContext context) {
-    if (currentStep < stepAmount) {
-      currentStep++;
+    if (getCurrentStep < stepAmount) {
+      _currentStep++;
     } else {
       //ToDo : Go To next step after completing the submission
     }