[LyX/master] Update ru.po and docs

[Yuriy Skalko]

commit cc30ec006161fbe8974e007d2cc3d326b1814110
Author: Yuriy Skalko <yuriy.skalko at gmail.com>
Date:   Tue Mar 14 16:27:32 2023 +0100

    Update ru.po and docs

 lib/doc/ru/Additional.lyx |  121 +++++++++++++------------
 lib/doc/ru/UserGuide.lyx  |   83 ++++++++++++++----
 lib/layouttranslations    |    4 +-
 po/ru.gmo                 |  Bin 772231 -> 777030 bytes
 po/ru.po                  |  220 +++++++++++++++++++--------------------------
 5 files changed, 226 insertions(+), 202 deletions(-)