Update sbt-scalafmt to 2.5.5

Author: scala-steward

project/plugins.sbt

@@ -6,4 +6,4 @@ addSbtPlugin("com.eed3si9n"   % "sbt-buildinfo"       % "0.13.0")
 addSbtPlugin("com.github.sbt" % "sbt-ci-release"      % "1.11.1")
 addSbtPlugin("com.lihaoyi"    % "scalatex-sbt-plugin" % "0.3.11")
 addSbtPlugin("org.scala-js"   % "sbt-scalajs"         % "1.7.1")
-addSbtPlugin("org.scalameta"  % "sbt-scalafmt"        % "2.5.2")
+addSbtPlugin("org.scalameta"  % "sbt-scalafmt"        % "2.5.5")