i18n: add language item for Laotian

Signed-off-by: Moritz Warning <moritzwarning@web.de>

Author: mwarning

www/index.html

@@ -44,6 +44,7 @@
             <option value="ja">日本語 (Japanese)</option>
             <option value="ka">ქართული (Georgian)</option>
             <option value="ko">한국어 (Korean)</option>
+            <option value="lo">Laotian (ພາສາລາວ)</option>
             <option value="lt">Lietuvių (Lithuanian)</option>
             <option value="lv">Latviešu (Latvian)</option>
             <option value="ml">മലയാളം (Malayalam)</option>