Update sbt-scalafmt to 2.5.5

Author: scala-steward-bot

project/plugin.sbt

@@ -8,7 +8,7 @@ addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.19.0")
 addSbtPlugin("org.portable-scala" % "sbt-scalajs-crossproject" % "1.3.2")
 addSbtPlugin("org.portable-scala" % "sbt-scala-native-crossproject" % "1.3.2")
 addSbtPlugin("org.scala-native" % "sbt-scala-native" % "0.5.8")
-addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.5.4")
+addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.5.5")
 
 scalacOptions ++= Seq(
   "-deprecation",