[HTTPS-Everywhere] Update Russian translation

[Aleksey Kosterin]

For
https://mail1.eff.org/pipermail/https-everywhere/2012-October/001588.html

Find
<!ENTITY https-everywhere.prefs.view_xml_source "Просмотр исходника XML">

Replace
<!ENTITY https-everywhere.prefs.view_xml_source "Просмотреть исходник XML">