Added backButtonAccessibleText to vehicle-model page

src/layouts/vehicle-model/vehicle-model.vue

@@ -7,6 +7,7 @@
           <siteSubHeader
             cmsWidgetName="SiteSubHeaderWidget"
             :hasBackButton="true"
+            :backButtonAccessibleText="backButtonAccessibleText"
             @click-event="backButtonAction"
           />
           <div class="fade-on-route-transition">
@@ -97,6 +98,13 @@
       siteSubHeader,
       vehicleBanner,
     },
+
+    computed: {
+      backButtonAccessibleText()
+            {
+              return this.getCmsContent(this.cmsWidgetName, "BackButtonAccessibleText")
+            }
+    },
   };
   </script>