Update mdoc, sbt-mdoc to 2.3.8

Author: the-pavels

project/plugins.sbt

@@ -4,7 +4,7 @@ addSbtPlugin("io.spray"              % "sbt-revolver"               % "0.10.0")
 addSbtPlugin("org.scalameta"         % "sbt-scalafmt"               % "2.5.2")
 addSbtPlugin("org.typelevel"         % "sbt-tpolecat"               % "0.5.1")
 addSbtPlugin("com.typesafe.sbt"      % "sbt-ghpages"                % "0.6.3")
-addSbtPlugin("org.scalameta"         % "sbt-mdoc"                   % "2.3.7")
+addSbtPlugin("org.scalameta"         % "sbt-mdoc"                   % "2.3.8")
 addSbtPlugin("com.lightbend.paradox" % "sbt-paradox"                % "0.10.3")
 addSbtPlugin("io.github.jonas"       % "sbt-paradox-material-theme" % "0.6.0")
 addSbtPlugin("com.typesafe.sbt"      % "sbt-site"                   % "1.3.3")