[LyX/master] Update it.po

[Enrico Forestieri]

commit 2b30d1d30a4e5c477e63d0db5cce571eae2dc354
Author: Enrico Forestieri <forenr at lyx.org>
Date:   Sun May 24 16:23:10 2020 +0200

    Update it.po

 po/it.gmo |  Bin 593938 -> 598841 bytes
 po/it.po  | 4403 ++++++++++++++++++++++++++++++++++---------------------------
 2 files changed, 2427 insertions(+), 1976 deletions(-)