Fix opera-stable stable InRelease’ changed its ‘Origin’

If you get an error when updating

apt update

… or

sudo apt update

E: Repository 'https://deb.opera.com/opera-stable stable InRelease' changed its 'Origin' value from 'Opera Software ASA' to 'Opera Software AS'
N: This must be accepted explicitly before updates for this repository can be applied. See apt-secure(8) manpage for details.
Do you want to accept these changes and continue updating from this repository? [y/N]

…. select yes and update