Update ru_RU.js
Update ru_RU.js

grammatical and style fixes
ghostry/webui-aria2,slime7/webui-aria2,ziahamza/webui-aria2,kuoruan/webui-aria2,slime7/webui-aria2,ziahamza/webui-aria2,kuoruan/webui-aria2,ghostry/webui-aria2