Test zig 0.12.0 on CI #1039

Job	Run time
Check	20s
Clippy	16s
Rustfmt	7s
spellcheck	9s
Test Suite (ubuntu-latest, 1.70.0, 0.12.0)	12m 7s
Test Suite (ubuntu-latest, stable, 0.12.0)	10m 17s
Test Suite (ubuntu-latest, nightly, 0.12.0)	10m 35s
Test Suite (macos-13, 1.70.0, 0.12.0)	19m 25s
Test Suite (macos-13, stable, 0.12.0)	18m 53s
Test Suite (macos-13, nightly, 0.12.0)	15m 41s
Test Suite (windows-latest, 1.70.0, 0.12.0)	16m 44s
Test Suite (windows-latest, stable, 0.12.0)	16m 10s
Test Suite (windows-latest, nightly, 0.12.0)	16m 12s
	2h 16m 56s

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