[chore] add a note to test config (#1427) #337

Job	Run time
Release Core / prev-tag	5s
Release Core / prepare (linux, s390x)	7m 15s
Release Core / prepare (darwin, amd64)	6m 18s
Release Core / prepare (linux, riscv64)	8m 32s
Release Core / prepare (linux, ppc64le)	7m 40s
Release Core / prepare (linux, amd64)	6m 46s
Release Core / prepare (linux, 386)	7m 6s
Release Core / prepare (linux, arm)	6m 40s
Release Core / prepare (linux, arm64)	6m 41s
Release Core / prepare (darwin, arm64)	6m 23s
Release Core (Windows)	0s
Release Core / Release	4m 13s
Release Core / Create GitHub issue on failed nightly release	-1s
	1h 7m 38s

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