i18n: reword the Next-URI hint (RU: 'Выкл - команда без ответа')

The dictionary hint, the RU help paragraph and README_RUS use the short
'выкл - команда без ответа' phrasing for the unchecked Next-URI case.
SW cache otaman-v182 (index.html/help-ru.html changed).

frontend/sw.js

@@ -1,4 +1,4 @@
-const CACHE = 'otaman-v181';
+const CACHE = 'otaman-v182';
 const URLS = [
   'index.html',
   'help.html',