fix(webapp): allow IDN TLDs in CNAME targets

Author: mdonoughe

www/webapp/src/components/Field/RecordCNAME.vue

@@ -2,7 +2,7 @@
 import { helpers } from 'vuelidate/lib/validators';
 import RecordItem from './RecordItem.vue';
 
-const domain = helpers.regex('domain', /^(([a-zA-Z0-9_\\-]+\.)+[a-zA-Z]{2,})[.]?$/);
+const domain = helpers.regex('domain', /^(([a-zA-Z0-9_\\-]+\.)+[a-zA-Z0-9\\-]{2,})[.]?$/);
 const trailingDot = helpers.regex('trailingDot', /[.]$/);
 
 export default {