Merge pull request #106 from scala-steward/update/sbt-scalafmt-2.5.6

Update sbt-scalafmt to 2.5.6

Author: mkurz

project/plugins.sbt

@@ -2,5 +2,5 @@ libraryDependencies += "org.scala-sbt" %% "scripted-plugin" % sbtVersion.value
 
 addSbtPlugin("com.github.sbt" % "sbt-ci-release"     % "1.11.2")
 addSbtPlugin("com.github.sbt" % "sbt-header"         % "5.11.0")
-addSbtPlugin("org.scalameta"  % "sbt-scalafmt"       % "2.5.5")
+addSbtPlugin("org.scalameta"  % "sbt-scalafmt"       % "2.5.6")
 addSbtPlugin("com.github.sbt" % "sbt-github-actions" % "0.28.0")