[LyX/2.3.x] Update it.po

[Enrico Forestieri]

commit 7bdbffa88fee90c7d20ac645e96ae8bd3aef1424
Author: Enrico Forestieri <forenr at lyx.org>
Date:   Thu Apr 23 16:57:57 2020 +0200

    Update it.po

 po/it.po | 1257 ++++++++++++++++++++++++++++----------------------------------
 1 files changed, 567 insertions(+), 690 deletions(-)