UI[Mobile center]: Updated link getting started in flutter doc

ui-ngx/src/app/modules/home/pages/mobile/bundes/mobile-app-configuration-dialog.component.html

@@ -72,7 +72,7 @@
       <div class="flex-1" translate>mobile.configuration-step.more-information</div>
       <a mat-stroked-button
          color="primary"
-         href="https://docs.flutter.dev/learn-flutter"
+         href="https://docs.flutter.dev/get-started/learn-flutter"
          target="_blank">
         <mat-icon class="tb-mat-24">rocket_launch</mat-icon>{{ 'mobile.configuration-step.getting-started' | translate }}
       </a>