fix validation translation

Author: LDFOUR\luisd

resources/assets/js/pages/content/whatnow.vue

@@ -593,7 +593,7 @@ export default {
         this.updateErrors.errors[`translations.${this.updateErrors.indexError}.attributionMessage`] = true;
       }
       if (!this.attributionToEdit.url) {
-        this.updateErrors.errors.url = ["URL no puede estar vacía"];
+        this.updateErrors.errors.url = [this.$t('content.whatnow.url_required')];
       }
 
       this.attributionEditTranslation.contributors.forEach((contributor, index) => {

resources/lang/en.json

@@ -508,7 +508,8 @@
       "publish_summary_ns": "National Society",
       "publish_summary_url": "Attribution URL",
       "publish_summary_message": "Attribution Message",
-      "no_key_messages": "No key messages published"
+      "no_key_messages": "No key messages published",
+      "url_required": "URL is required"
     },
     "edit_whatnow": {
       "title": "Title",