Update sbt-scalafmt to 2.4.6

Author: 47erbot

project/plugins.sbt

@@ -1,7 +1,7 @@
 addSbtPlugin("org.scala-exercises" % "sbt-exercise"             % "0.6.7")
 addSbtPlugin("com.github.sbt"      % "sbt-ci-release"           % "1.5.10")
 addSbtPlugin("org.scalameta"       % "sbt-mdoc"                 % "2.2.23")
-addSbtPlugin("org.scalameta"       % "sbt-scalafmt"             % "2.4.4")
+addSbtPlugin("org.scalameta"       % "sbt-scalafmt"             % "2.4.6")
 addSbtPlugin("de.heikoseeberger"   % "sbt-header"               % "5.6.0")
 addSbtPlugin("com.alejandrohdezma" % "sbt-github"               % "0.10.0")
 addSbtPlugin("com.alejandrohdezma" % "sbt-github-header"        % "0.10.0")