po: Update translation (Italian)
po: Update translation (Italian)

Update po/it.po at 32.3%
https://translate.fedoraproject.org/projects/ibus/ibus/it/

BUG=https://github.com/ibus/ibus/pull/2399

fujiwarat/ibus,fujiwarat/ibus,ibus/ibus,ibus/ibus,ibus/ibus,fujiwarat/ibus,fujiwarat/ibus,ibus/ibus