feat: check for karshuni in search result item

src/.vuepress/components/SearchResultList.vue

@@ -71,7 +71,7 @@ export default {
     getItemUrl(item) {
       let language = '';
 
-      if (item.lang === 'ara') {
+      if (item.lang === 'ara' || item.lang === 'karshuni') {
         language = 'arabic-karshuni';
       } else if (item.lang === 'syc') {
         language = 'syriac';