chore: fix up the README example (#194) #737

Job	Run time
clippy	1m 4s
feature-checks	3m 51s
docs	1m 18s
doctest	1m 29s
fmt	12s
test stable (ubuntu-latest)	1m 11s
test stable --all-features (ubuntu-latest)	2m 15s
test 1.70 (ubuntu-latest)	47s
test stable (macos-latest)	1m 27s
test stable --all-features (macos-latest)	2m 46s
test 1.70 (macos-latest)	54s
test stable (windows-latest)	3m 9s
test stable --all-features (windows-latest)	4m 58s
test 1.70 (windows-latest)	2m 50s
	28m 11s

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