This changes the release artefacts workflow to use `macos-12` runners
instead of `macos-11`, as the latter will be fully deprecated in a few
days.
This also updates `cibuildwheel` to a newer version, as it would not
'repair' the macOS wheels correctly
The difference is that now instead of outputting a macOS 11+ compatible
wheel, we output a macOS 12+ compatible one. This is fine, as macOS 11
is considered EOL since September 2023.
We can also expect that macOS 12 will be considered EOL in September
2024, as Apple usually supports the last 3 macOS version, and macOS 15
is scheduled to be released around that time.
