ci: remove deprecated macos-12 runner #913

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5 errors and 3 warnings

No such keg: /usr/local/Cellar/qemu

Failed to load cask: /tmp/qemu.rb Cask 'qemu' is unreadable: wrong constant name #<Class:0x00000001310521c0>

Formula installation already attempted: qemu

Process completed with exit code 1.

The process '/usr/local/bin/limactl' failed with exit code 1

Treating /tmp/qemu.rb as a formula.

qemu 9.1.1 is available and more recent than version 9.0.2.

HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK is set: not checking for outdated dependents or dependents with broken linkage!