Use ghcup action #274

Job	Run time
arm (arm32v7)	1m 37s
freebsd (self-hosted, FreeBSD, X64, 9.4.8)	28s
build (ubuntu-latest, 8.6, 3.8.1.0)	1m 42s
freebsd (self-hosted, FreeBSD, X64, 9.6.4)	27s
darwin_arm (self-hosted, macOS, ARM64, 8.10.7)	1s
build (ubuntu-latest, 8.8, 3.8.1.0)	1m 41s
darwin_arm (self-hosted, macOS, ARM64, 9.2.6)	1s
arm (arm64v8)	1s
build (ubuntu-latest, 8.10, 3.8.1.0)	1m 41s
darwin_arm (self-hosted, macOS, ARM64, 9.4.4)	1m 46s
i386	25s
build (ubuntu-latest, 9.0, 3.8.1.0)	1m 41s
build (ubuntu-latest, 9.2, 3.8.1.0)	1m 41s
build (ubuntu-latest, 9.4, 3.8.1.0)	1m 34s
build (ubuntu-latest, 9.6, 3.8.1.0)	1m 41s
build (ubuntu-latest, 9.8, 3.8.1.0)	1m 41s
build (macos-13, 9.4, 3.8.1.0)	1m 42s
build (macos-13, 9.6, 3.8.1.0)	1m 40s
build (windows-latest, 9.4, 3.8.1.0)	1m 39s
build (windows-latest, 9.6, 3.8.1.0)	1m 35s
	24m 44s

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