fix a few typos #40

Job	Run time
ci (tpb, ubuntu-22.04, --pb --threads --enable-libffi, test-some-fast)	39m 0s
ci (a6osx, macos-12)	16m 53s
ci (ta6osx, macos-12)	22m 17s
ci (i3le, ubuntu-22.04)	18m 46s
ci (ti3le, ubuntu-22.04)	23m 49s
ci (a6le, ubuntu-22.04)	13m 47s
ci (ta6le, ubuntu-22.04)	22m 38s
ci (ta6le, ubuntu-22.04, reboot, -m=ta6le --force, re.boot SCHEME="chezscheme", test-some-fast)	15m 17s
ci (i3nt, windows-2022, vs)	18m 42s
ci (ti3nt, windows-2022, vs)	27m 30s
ci (a6nt, windows-2022, vs)	17m 45s
ci (ta6nt, windows-2022, vs)	26m 56s
ci (ta6nt, windows-2022, gcc)	20m 29s
	4h 43m 49s

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