Merge pull request #1002 from playframework/update/scalafmt-core-3.9.1

scalafmt-core 3.9.1 (was 3.8.6)

Author: mkurz

.scalafmt.conf

@@ -11,4 +11,4 @@ rewrite.sortModifiers.order = [ "private", "protected", "final", "sealed", "abst
 spaces.inImportCurlyBraces = true   # more idiomatic to include whitepsace in import x.{ yyy }
 trailingCommas = preserve
 newlines.afterCurlyLambda = preserve
-version = 3.8.6
+version = 3.9.1