[chore] add a note to test config (#1427) #340

Job	Run time
Release Core / prev-tag	4s
Release Core / prepare (linux, arm64)	7m 39s
Release Core / prepare (linux, 386)	6m 52s
Release Core / prepare (linux, ppc64le)	7m 16s
Release Core / prepare (linux, riscv64)	7m 31s
Release Core / prepare (linux, arm)	6m 38s
Release Core / prepare (linux, s390x)	6m 54s
Release Core / prepare (darwin, amd64)	5m 53s
Release Core / prepare (darwin, arm64)	5m 53s
Release Core / prepare (linux, amd64)	7m 5s
Release Core (Windows)	0s
Release Core / Release	5m 55s
Release Core / Create GitHub issue on failed nightly release	-1s
	1h 7m 39s

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