Use an sbt-scalafmt badge that shows the actual latest version #4196

Job	Run time
formatting	2m 31s
test (11, windows-latest)	8m 45s
test (11, ubuntu-latest)	6m 33s
native-image (macOS-latest, default)	5m 1s
native-image (ubuntu-latest, default)	3m 15s
test (21, windows-latest)	10m 53s
native-image (ubuntu-latest, musl)	3m 23s
test (21, ubuntu-latest)	5m 59s
dockerize	0s
	46m 20s

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