[LyX/master] Update Russian localization

[Juergen Spitzmueller]

commit 06aed96f3406495e566bd2e44e09a25b35a7639f
Author: Yuriy Skalko <yuriy.skalko at gmail.com>
Date:   Wed Sep 9 08:56:38 2020 +0300

    Update Russian localization

 lib/doc/ru/UserGuide.lyx                           |  364 +-
 lib/examples/ru/Presentations/Beamer.lyx           |   34 +-
 .../Beamer_Article_%28Standard_Class%29.lyx        |    2 +-
 po/ru.po                                           |28520 ++++++++++----------
 4 files changed, 14405 insertions(+), 14515 deletions(-)