ci: pin to ubuntu-22.04, latest just broke things #101

Job	Run time
init	1s
build (1.80.1, x86_64-unknown-linux-gnu)	5m 37s
build (1.80.1, aarch64-unknown-linux-gnu)	7m 0s
build (1.80.1, x86_64-unknown-linux-musl)	6m 18s
build (1.80.1, aarch64-unknown-linux-musl)	7m 14s
build (1.80.1, x86_64-apple-darwin)	9m 58s
build (1.80.1, x86_64-pc-windows-msvc)	11m 34s
build (1.80.1, aarch64-apple-darwin)	7m 45s
release	13s
publish	2m 46s
brew / Bump Brew Version	32s
pages / docs / build	9s
pages / deploy	12s
	59m 19s

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