Safe to update. Nintendo only updated their outdated ssl certs.
Official changelog:
https://en-americas-support.nintendo.com/app/answers/detail/a_id/22525/~/nintendo-switch-system-updates-and-change-history
Official changelog:
https://en-americas-support.nintendo.com/app/answers/detail/a_id/22525/~/nintendo-switch-system-updates-and-change-history