Update sbt-scalafmt to 2.5.4

Author: scala-steward

project/plugins.sbt

@@ -1,5 +1,5 @@
 addSbtPlugin("com.47deg"          % "sbt-microsites"           % "1.4.4")
-addSbtPlugin("org.scalameta"      % "sbt-scalafmt"             % "2.5.3")
+addSbtPlugin("org.scalameta"      % "sbt-scalafmt"             % "2.5.4")
 addSbtPlugin("com.github.sbt"     % "sbt-ci-release"           % "1.9.2")
 addSbtPlugin("org.scala-js"       % "sbt-scalajs"              % "1.18.1")
 addSbtPlugin("org.portable-scala" % "sbt-scalajs-crossproject" % "1.3.2")