docs: fix spelling #120

Job	Run time
check_clippy	3m 46s
check_docs	3m 29s
check_msrv	3m 47s
build_all_features	5m 7s
build_all_platforms (ubuntu-latest)	2m 34s
build_default_features (ubuntu-latest)	1m 7s
build_all_platforms (macos-latest)	6m 10s
build_default_features (macos-latest)	1m 51s
build_all_platforms (windows-latest)	5m 48s
build_under_wasm	1m 15s
build_default_features (windows-latest)	2m 2s
unit	3m 32s
	40m 28s

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