Support GHC-9.6 wrt #979 #1458

Job	Run time
Build linux binary (ubuntu-latest, i386-linux-ghcup, 8.10.7, 32)	18m 51s
Build linux binary (ubuntu-latest, x86_64-linux-ghcup, 9.6.5, 64)	13m 27s
Build binary (FreeBSD)	5m 11s
Build ARM binary (self-hosted, Linux, ARM64, maerwald, armv7-linux-ghcup, 9.2.8, ARM)	33m 28s
Build ARM binary (self-hosted, Linux, ARM64, maerwald, aarch64-linux-ghcup, 9.6.5, ARM64)	10m 58s
Build binary (Mac/Win) (self-hosted, macOS, ARM64, aarch64-apple-darwin-ghcup, 9.6.5, ARM64)	10m 9s
Build binary (Mac/Win) (macOS-11, x86_64-apple-darwin-ghcup, 9.6.5, 64)	38m 40s
Build binary (Mac/Win) (windows-latest, x86_64-mingw64-ghcup, 9.6.5, 64)	18m 17s
Test FreeBSD	34s
Test linux (ubuntu-latest, i386-linux-ghcup, 8.10.7, 32, Alpine)	2m 48s
hls	28m 2s
Test linux (ubuntu-latest, x86_64-linux-ghcup, 9.6.5, 64, Alpine)	2m 28s
Test linux (ubuntu-latest, x86_64-linux-ghcup, 9.6.5, 64, Ubuntu)	7m 1s
Test Mac/Win (self-hosted, macOS, ARM64, aarch64-apple-darwin-ghcup, 9.6.5, ARM64, na)	5m 4s
Test Mac/Win (macOS-11, x86_64-apple-darwin-ghcup, 9.6.5, 64, na)	8m 12s
Test Mac/Win (windows-latest, x86_64-mingw64-ghcup, 9.6.5, 64, na)	7m 58s
Test ARM (self-hosted, Linux, ARM64, maerwald, armv7-linux-ghcup, 9.2.8, ARM, Ubuntu)	4m 15s
Test ARM (self-hosted, Linux, ARM64, maerwald, aarch64-linux-ghcup, 9.6.5, ARM64, Ubuntu)	5m 27s
release	0s
	3h 40m 50s

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