Merge pull request #3068 from scala-steward/update/sbt-scalafmt-2.5.4

Update sbt-scalafmt to 2.5.4

Author: konnov

project/plugins.sbt

@@ -1,5 +1,5 @@
 // https://scalameta.org/scalafmt/docs/installation.html#sbt
-addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.5.2")
+addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.5.4")
 // https://github.com/sbt/sbt-assembly
 addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "1.2.0")
 // https://github.com/marcuslonnberg/sbt-docker