chore: fix some typos in comments #2800

Job	Run time
Verify hyper.h is up to date	14s
semver	2m 25s
Check Style	7s
minimal-versions	44s
Test with Miri	2m 13s
Test C API (FFI)	27s
features	1m 0s
Check MSRV	3m 5s
udeps	22s
Test stable on ubuntu-latest	1m 11s
Test stable on windows-latest	1m 54s
Test stable on macOS-latest	1m 12s
Test beta on ubuntu-latest	1m 24s
Test beta on windows-latest	2m 16s
Test beta on macOS-latest	1m 20s
Test nightly on ubuntu-latest	1m 24s
Test nightly on windows-latest	2m 35s
Test nightly on macOS-latest	1m 29s
Build docs	24s
Check exposed types	20s
CI is green	1s
	26m 7s

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