[LyX/master] Translation of new index features (step 4)

[jpc]

commit dc590ff5093c2581e9bfadb9f18140a984de7744
Author: jpc <jpc at lyx.org>
Date:   Mon Jan 16 11:36:10 2023 +0100

            Translation of new index features (step 4)

 lib/doc/fr/UserGuide.lyx |11137 +++++++++++++++++++++++++---------------------
 1 files changed, 5965 insertions(+), 5172 deletions(-)