Slovenian language, as many others languages, is not present in the
beta/master projects in Transifex.
For some reason, Transiflex removed all current translations, this was
already fixed in 12, but as there are not automatic forward-port for
translations, this is a manual forward-port.
opw-2060055
closesodoo/odoo#36374
Signed-off-by: Nicolas Martinelli (nim) <nim@odoo.com>