fix(product-carousel): correct track variable in thumbnail loop

src/app/features/store/components/product-carousel/product-carousel.component.html

@@ -54,7 +54,7 @@
   <!-- Thumbnails Row -->
   @if (images().length > 1) {
     <div class="product-carousel__thumbnails">
-      @for (image of images(); track image; let idx = $index) {
+      @for (image of images(); track $index; let idx = $index) {
         <button
           type="button"
           class="product-carousel__thumbnail border-0 p-0 overflow-hidden bg-light"