Merge pull request #451 from scala-steward/update/sbt-scalafmt-2.4.6

Update sbt-scalafmt to 2.4.6

Author: mergify[bot]

project/plugins.sbt

@@ -1,5 +1,5 @@
 addSbtPlugin("org.scala-js"   % "sbt-scalajs"   % "1.8.0")
-addSbtPlugin("org.scalameta"  % "sbt-scalafmt"  % "2.4.5")
+addSbtPlugin("org.scalameta"  % "sbt-scalafmt"  % "2.4.6")
 addSbtPlugin("org.xerial.sbt" % "sbt-sonatype"  % "3.9.10")
 addSbtPlugin("com.github.sbt" % "sbt-release"   % "1.1.0")
 addSbtPlugin("com.github.sbt" % "sbt-pgp"       % "2.1.2")