Reset key_document param after comment attachment is sent

src/components/Feature/Detail/FeatureComments.vue

@@ -268,6 +268,8 @@ export default {
                   commentId: response.data.id,
                 })
                 .then(() => {
+                  // Reset isKeyDocument to default
+                  this.comment_form.attachment_file.isKeyDocument = false;
                   this.confirmComment();
                 });
             } else {