fix legacy website link

Author: ann-linh-mitre

src/components/ServiceUnavailable.vue

@@ -28,7 +28,9 @@ import { useGenericGlobalsStore } from '@/stores/genericGlobals.ts';
 export default {
   name: 'ServiceUnavailable',
   data() {
-    useGenericGlobalsStore().legacyCveWebsiteLink
+    return {
+      legacyCveWebsiteLink: useGenericGlobalsStore().legacyCveWebsiteLink
+    }
   }
 };
 </script>