CI: update pixi to cppTango 10.0.0-rc3
Forgot to update the pixi versions with the earlier MR, !732 (merged).
Also need to set system-requirements for macOS, as the default is 13.0, while the runner is 12.6.
Edited by Anton Joubert
Forgot to update the pixi versions with the earlier MR, !732 (merged).
Also need to set system-requirements for macOS, as the default is 13.0, while the runner is 12.6.