Update sbt-jmh to 0.4.8

Author: scala-steward

project/plugins.sbt

@@ -4,7 +4,7 @@ addSbtPlugin("com.github.ghik" % "sbt-nosbt" % "0.2.1")
 addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.20.1")
 addSbtPlugin("org.scala-js" % "sbt-jsdependencies" % "1.0.2")
 addSbtPlugin("org.jetbrains.scala" % "sbt-ide-settings" % "1.1.3")
-addSbtPlugin("pl.project13.scala" % "sbt-jmh" % "0.4.7")
+addSbtPlugin("pl.project13.scala" % "sbt-jmh" % "0.4.8")
 addSbtPlugin("com.github.sbt" % "sbt-ci-release" % "1.11.2")
 addSbtPlugin("com.github.sbt" % "sbt-unidoc" % "0.6.0")
 addSbtPlugin("com.typesafe" % "sbt-mima-plugin" % "1.1.4")