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add build/publish notes #40

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Run time

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Job	Run time
test (3.7, ubuntu-latest)	8s
test (3.7, windows-latest)	44s
test (3.7, macos-latest)	11s
test (3.8, ubuntu-latest)	10s
test (3.8, windows-latest)	47s
test (3.8, macos-latest)	11s
test (3.9, ubuntu-latest)	5s
test (3.9, windows-latest)	28s
test (3.9, macos-latest)	10s
test (3.10, ubuntu-latest)	9s
test (3.10, windows-latest)	25s
test (3.10, macos-latest)	11s
test (3.11, ubuntu-latest)	7s
test (3.11, windows-latest)	1m 9s
test (3.11, macos-latest)	11s
test (3.12, ubuntu-latest)	4s
test (3.12, windows-latest)	21s
test (3.12, macos-latest)	12s
	5m 43s