[LyX/master] Update Russian localization

[Yuriy Skalko]

commit eb7ad5757bb8b591c61f9ea64f28ad158ecd00e1
Author: Yuriy Skalko <yuriy.skalko at gmail.com>
Date:   Thu Oct 29 10:14:04 2020 +0200

    Update Russian localization

 lib/doc/ru/Additional.lyx | 1778 ++++++++++++++++++++++++---------------------
 lib/doc/ru/UserGuide.lyx  |    2 -
 po/ru.gmo                 |  Bin 745867 -> 745831 bytes
 po/ru.po                  |   14 +-
 4 files changed, 937 insertions(+), 857 deletions(-)