typo: fix typo in genesis #3324

Job	Run time
docs	1m 8s
doctest	2m 40s
cfg-check	37s
clippy	1m 22s
feature-checks	6m 37s
fmt	13s
no-std	37s
wasm-wasi	2m 57s
test ubuntu-latest stable --no-default-features	2m 34s
wasm-unknown	2m 11s
test ubuntu-latest stable	2m 36s
test ubuntu-latest nightly --no-default-features	1m 35s
test ubuntu-latest nightly	1m 47s
test ubuntu-latest 1.76 --no-default-features	1m 30s
test ubuntu-latest 1.76	1m 48s
test windows-latest stable --no-default-features	6m 46s
test windows-latest stable	5m 57s
test windows-latest nightly --no-default-features	5m 12s
test windows-latest nightly	4m 15s
test windows-latest 1.76 --no-default-features	3m 51s
test windows-latest 1.76	3m 50s
	1h 0m 3s

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