minor grammar fix in readme (#676) #1673

Job	Run time
pre-release	22s
min-versions	13s
dev and docs requirements check	31s
build (3.9, ubuntu-latest)	1m 0s
docs	1m 51s
build (3.9, windows-latest)	2m 40s
upstream	20s
build (3.10, ubuntu-latest)	59s
build (3.10, windows-latest)	3m 5s
build (3.10, macos-latest)	1m 16s
build (3.11, ubuntu-latest)	57s
build (3.11, windows-latest)	2m 52s
build (3.11, macos-latest)	57s
build (3.12, ubuntu-latest)	1m 12s
build (3.12, windows-latest)	3m 5s
build (3.12, macos-latest)	1m 0s
	22m 20s

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