Update sbt-jmh to 0.4.8 (#424)

Author: scala-steward

project/plugins.sbt

@@ -2,7 +2,7 @@ addSbtPlugin("org.scalastyle"           %% "scalastyle-sbt-plugin" % "1.0.0")
 addSbtPlugin("org.scalariform"           % "sbt-scalariform"       % "1.8.3")
 addSbtPlugin("org.scoverage"             % "sbt-scoverage"         % "2.3.1")
 addSbtPlugin("com.github.sbt"            % "sbt-release"           % "1.4.0")
-addSbtPlugin("pl.project13.scala"        % "sbt-jmh"               % "0.4.7")
+addSbtPlugin("pl.project13.scala"        % "sbt-jmh"               % "0.4.8")
 addSbtPlugin("com.github.sbt"            % "sbt-pgp"               % "2.3.1")
 addSbtPlugin("com.github.sbt"         % "sbt-header"            % "5.11.0")
 addSbtPlugin("org.xerial.sbt"            % "sbt-sonatype"          % "3.12.2")