Update dependency org.scalameta:sbt-mdoc to v2.3.6

Author: renovate[bot]

project/plugins.sbt

@@ -1,5 +1,5 @@
 addSbtPlugin("com.typesafe.sbt" % "sbt-site" % "1.4.1")
-addSbtPlugin("org.scalameta" % "sbt-mdoc" % "2.3.4")
+addSbtPlugin("org.scalameta" % "sbt-mdoc" % "2.3.6")
 addSbtPlugin("com.lightbend.paradox" % "sbt-paradox" % "0.10.2")
 addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.4.3")
 addSbtPlugin("com.typesafe" % "sbt-mima-plugin" % "1.1.1")