add arm64 back in #69

Job	Run time
amd64	9m 17s
amd64	9m 17s
amd64	9m 17s
amd64	9m 17s
arm64	10m 59s
arm64	2m 18s
arm64	1h 8m 51s
arm64	1h 8m 51s
test-${{ matrix.config.arch }}-docker	0s
test-${{ matrix.config.arch }}-docker	0s
merge	0s
merge	0s
merge	0s
merge	0s
test-amd64-docker	3m 38s
test-amd64-docker	3m 38s
test-arm64-docker	7s
test-arm64-docker	4s
	3h 15m 34s

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