Update scalafmt-core to 3.8.6 (#392) #506

Job	Run time
build (ubuntu-latest)	3m 11s
scripted (ubuntu-latest, 1.2.8)	7m 37s
build (macos-latest)	12m 12s
scripted (ubuntu-latest, 1.3.13)	6m 0s
scripted (ubuntu-latest, project)	6m 4s
scripted (macos-latest, 1.2.8)	28m 28s
scripted (macos-latest, 1.3.13)	26m 13s
build (windows-latest)	4m 10s
scripted (macos-latest, project)	21m 50s
scripted (windows-latest, 1.2.8)	6h 0m 13s
scripted (windows-latest, 1.3.13)	8m 22s
scripted (windows-latest, project)	8m 16s
ci-passed	0s
	8h 12m 36s

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