Update sbt-scalafmt to 2.5.5

Author: scala-steward

project/plugins.sbt

@@ -2,5 +2,5 @@ libraryDependencies += "org.scala-sbt" %% "scripted-plugin" % sbtVersion.value
 
 addSbtPlugin("com.github.sbt"    % "sbt-ci-release"     % "1.11.1")
 addSbtPlugin("de.heikoseeberger" % "sbt-header"         % "5.10.0")
-addSbtPlugin("org.scalameta"     % "sbt-scalafmt"       % "2.5.4")
+addSbtPlugin("org.scalameta"     % "sbt-scalafmt"       % "2.5.5")
 addSbtPlugin("com.github.sbt"    % "sbt-github-actions" % "0.25.0")