Update sbt-scalafmt to 2.4.6 (#258)

Co-authored-by: scala-steward <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Jannik Arndt <[email protected]>

Author: github-actions[bot]

project/plugins.sbt

@@ -2,7 +2,7 @@
 addSbtPlugin("io.spray" % "sbt-revolver" % "0.9.1")
 
 // adds scalafmt
-addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.4.4")
+addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.4.6")
 
 // sbt> scapegoat
 addSbtPlugin("com.sksamuel.scapegoat" %% "sbt-scapegoat" % "1.1.1")