meta: add note about grammar,spelling prs #846

Job	Run time
doctest	1m 49s
test stable (ubuntu-latest)	1m 24s
test stable --all-features (ubuntu-latest)	2m 19s
test 1.70 (ubuntu-latest)	1m 4s
clippy	1m 26s
test stable (macos-latest)	1m 59s
test stable --all-features (macos-latest)	2m 43s
test 1.70 (macos-latest)	1m 9s
docs	1m 14s
feature-checks	3m 48s
test stable (windows-latest)	3m 27s
test stable --all-features (windows-latest)	5m 8s
fmt	14s
test 1.70 (windows-latest)	2m 46s
	30m 30s

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