Update sbt-scalafmt to 2.5.6

Author: scala-steward

example/project/plugins.sbt

@@ -8,7 +8,7 @@ addSbtPlugin("com.thesamet" % "sbt-protoc" % "1.0.3")
 
 addSbtPlugin("ch.epfl.scala" % "sbt-scalajs-bundler" % "0.21.1")
 
-addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.5.2")
+addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.5.6")
 
 libraryDependencies += "com.thesamet.scalapb" %% "compilerplugin" % "0.11.4"
 

project/plugins.sbt

@@ -4,7 +4,7 @@ addSbtPlugin("ch.epfl.scala" % "sbt-scalajs-bundler" % "0.21.1")
 
 addSbtPlugin("com.github.sbt" % "sbt-ci-release" % "1.9.3")
 
-addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.5.2")
+addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.5.6")
 
 addSbtPlugin("com.eed3si9n" % "sbt-buildinfo" % "0.13.1")