Update sbt-jmh to 0.4.8 (#824)

Co-authored-by: scala-steward-asf[bot] <147768647+scala-steward-asf[bot]@users.noreply.github.com>

Author: scala-steward-asf[bot]

project/plugins.sbt

@@ -15,7 +15,7 @@ addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.5.5")
 addSbtPlugin("com.github.sbt" % "sbt-dynver" % "5.1.1")
 addSbtPlugin("com.github.sbt" % "sbt-unidoc" % "0.6.0")
 addSbtPlugin("com.thoughtworks.sbt-api-mappings" % "sbt-api-mappings" % "3.0.2")
-addSbtPlugin("pl.project13.scala" % "sbt-jmh" % "0.4.7")
+addSbtPlugin("pl.project13.scala" % "sbt-jmh" % "0.4.8")
 addSbtPlugin("net.virtual-void" % "sbt-dependency-graph" % "0.10.0-RC1") // for advanced PR validation features
 addSbtPlugin("com.github.sbt" % "sbt-boilerplate" % "0.7.0")
 addSbtPlugin("com.lightbend.sbt" % "sbt-bill-of-materials" % "1.0.2")