Update mdoc, sbt-mdoc to 2.5.2 (#97)

Co-authored-by: scala-steward <122865766+scala-steward-geirolz[bot]@users.noreply.github.com>
Co-authored-by: David Geirola <david.geirola@gmail.com>

project/plugins.sbt

@@ -3,7 +3,7 @@ import sbt.addSbtPlugin
 addSbtPlugin("org.scalameta"  % "sbt-scalafmt"           % "2.5.2")
 addSbtPlugin("org.scoverage"  % "sbt-scoverage"          % "2.0.9")
 addSbtPlugin("com.github.sbt" % "sbt-ci-release"         % "1.5.12")
-addSbtPlugin("org.scalameta"  % "sbt-mdoc"               % "2.5.1")
+addSbtPlugin("org.scalameta"  % "sbt-mdoc"               % "2.5.2")
 addSbtPlugin("com.eed3si9n"   % "sbt-buildinfo"          % "0.11.0")
 addSbtPlugin("org.jmotor.sbt" % "sbt-dependency-updates" % "1.2.8")
 addSbtPlugin("com.typesafe"   % "sbt-mima-plugin"        % "1.1.3")