Update doctest-runtime, sbt-doctest to 0.12.3

Author: typelevel-steward[bot]

project/plugins.sbt

@@ -4,7 +4,7 @@ addSbtPlugin("org.typelevel" % "sbt-typelevel-site" % sbtTypelevelVersion)
 addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.20.1")
 addSbtPlugin("org.scala-native" % "sbt-scala-native" % "0.5.9")
 addSbtPlugin("com.armanbilge" % "sbt-scala-native-config-brew-github-actions" % "0.4.0")
-addSbtPlugin("io.github.sbt-doctest" % "sbt-doctest" % "0.12.2")
+addSbtPlugin("io.github.sbt-doctest" % "sbt-doctest" % "0.12.3")
 addSbtPlugin("pl.project13.scala" % "sbt-jmh" % "0.4.8")
 
 libraryDependencySchemes += "com.lihaoyi" %% "geny" % VersionScheme.Always