Pontoon: Update Slovenian (sl) localization of AMO Frontend
Pontoon: Update Slovenian (sl) localization of AMO Frontend

Co-authored-by: Matjaž Horvat <847434e96e834c5262f9edcf6084b3f16d13cae6@gmail.com>

mozilla/addons-frontend,mozilla/addons-frontend,mozilla/addons-frontend,mozilla/addons-frontend