Update sbt-scalafmt to 2.5.6

Author: scala-steward

project/plugins.sbt

@@ -5,7 +5,7 @@ libraryDependencies += "com.thesamet.scalapb" %% "compilerplugin" % "0.11.11"
 
 
 // Scalafmt
-addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.4.6")
+addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.5.6")
 
 // Scalac options
 addSbtPlugin("io.github.davidgregory084" % "sbt-tpolecat" % "0.1.22")