Fix some typos in the Release Notes #15

Job	Run time
ci (tpb, ubuntu-22.04, --pb --threads --enable-libffi, test-some-fast)	38m 26s
ci (tpb, ubuntu-22.04, --pb --threads --enable-libffi, test-some-fast)	38m 26s
ci (a6osx, macos-12)	20m 52s
ci (a6osx, macos-12)	20m 52s
ci (ta6osx, macos-12)	29m 0s
ci (ta6osx, macos-12)	20m 3s
ci (i3le, ubuntu-22.04)	16m 40s
ci (i3le, ubuntu-22.04)	16m 40s
ci (ti3le, ubuntu-22.04)	20m 27s
ci (ti3le, ubuntu-22.04)	20m 27s
ci (a6le, ubuntu-22.04)	15m 56s
ci (a6le, ubuntu-22.04)	15m 56s
ci (ta6le, ubuntu-22.04)	20m 17s
ci (ta6le, ubuntu-22.04)	20m 17s
ci (ta6le, ubuntu-22.04, reboot, -m=ta6le --force, re.boot SCHEME="chezscheme", test-some-fast)	15m 20s
ci (ta6le, ubuntu-22.04, reboot, -m=ta6le --force, re.boot SCHEME="chezscheme", test-some-fast)	15m 20s
ci (i3nt, windows-2022, vs)	28m 50s
ci (i3nt, windows-2022, vs)	28m 50s
ci (ti3nt, windows-2022, vs)	35m 48s
ci (ti3nt, windows-2022, vs)	35m 48s
ci (a6nt, windows-2022, vs)	36m 35s
ci (a6nt, windows-2022, vs)	36m 35s
ci (ta6nt, windows-2022, vs)	34m 23s
ci (ta6nt, windows-2022, vs)	34m 23s
ci (ta6nt, windows-2022, gcc)	20m 57s
ci (ta6nt, windows-2022, gcc)	20m 57s
	10h 58m 5s

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