git-gui: update russian translation
git-gui: update russian translation

Improve the translation of warning given by mergetool when staging files with
conflict markers.

Suggested-by: Alexey Shumkin <a84167e822b466935e3cb1f6367baa6c9568ea28@mail.ru>
Tipping-vote-by: Dmitry Potapov <c0ae3c59f8716a0b559d1fcf9f41946c6416b118@gmail.com>
Signed-off-by: Alex Riesen <053ce55f4869b7f450d1d77b8f162c6f2bb9e137@gmail.com>
Signed-off-by: Pat Thoyts <fe43a83262eef1680511f524a1e74d43c633cffe@users.sourceforge.net>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git