test-compat-sf.R: fix typos #579

Job	Run time
macOS-latest (oldrel, none)	3m 13s
macOS-latest (release, none)	3m 50s
windows-latest (oldrel, none)	5m 0s
windows-latest (release, none)	5m 5s
windows-latest (devel, none)	5m 29s
ubuntu-22.04 (release, none)	3m 0s
macOS-latest (release, macos-brew)	27m 8s
windows-latest (release, chocolatey)	15m 34s
windows-latest (release, chocolatey-ltr)	18m 1s
windows-latest (devel, chocolatey)	17m 21s
ubuntu-22.04 (release, ubuntu-nightly)	10m 55s
ubuntu-22.04 (devel, ubuntu-nightly)	12m 37s
ubuntu-22.04 (release, ubuntugis)	11m 42s
ubuntu-22.04 (release, ubuntu)	13m 54s
ubuntu-22.04 (release [hard-deps], ubuntu)	7m 33s
ubuntu-22.04 (release, ubuntu-ltr)	12m 31s
	2h 52m 53s

Provide feedback