fix some typos #20

Job	Run time
ci (tpb, ubuntu-22.04, --pb --threads --enable-libffi, test-some-fast)	38m 20s
ci (a6osx, macos-12)	14m 17s
ci (ta6osx, macos-12)	24m 39s
ci (i3le, ubuntu-22.04)	15m 21s
ci (ti3le, ubuntu-22.04)	21m 8s
ci (a6le, ubuntu-22.04)	13m 47s
ci (ta6le, ubuntu-22.04)	21m 3s
ci (ta6le, ubuntu-22.04, reboot, -m=ta6le --force, re.boot SCHEME="chezscheme", test-some-fast)	17m 54s
ci (i3nt, windows-2022, vs)	28m 54s
ci (ti3nt, windows-2022, vs)	36m 16s
ci (a6nt, windows-2022, vs)	33m 28s
ci (ta6nt, windows-2022, vs)	40m 37s
ci (ta6nt, windows-2022, gcc)	23m 35s
	5h 29m 19s

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