Update sbt-mdoc to 2.5.2

Author: typelevel-steward[bot]

project/plugins.sbt

@@ -1,7 +1,7 @@
 addSbtPlugin("org.portable-scala" % "sbt-scala-native-crossproject" % "1.3.2")
 addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.14.0")
 addSbtPlugin("org.scala-native" % "sbt-scala-native" % "0.4.16")
-addSbtPlugin("org.scalameta" % "sbt-mdoc" % "2.3.8")
+addSbtPlugin("org.scalameta" % "sbt-mdoc" % "2.5.2")
 addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.5.2")
 addSbtPlugin("org.scoverage" % "sbt-scoverage" % "2.0.9")
 addSbtPlugin("org.typelevel" % "sbt-typelevel" % "0.4.22")