Update sbt-mdoc to 2.1.5

[scala-steward]

Updates org.scalameta:sbt-mdoc from 2.1.4 to 2.1.5.
GitHub Release Notes - Version Diff

I'll automatically update this PR to resolve conflicts as long as you don't change it yourself.

If you'd like to skip this version, you can just close this PR. If you have any feedback, just mention me in the comments below.

Have a fantastic day writing Scala!

Ignore future updates

Add this to your .scala-steward.conf file to ignore future updates of this dependency:

updates.ignore = [ { groupId = "org.scalameta", artifactId = "sbt-mdoc" } ]

labels: sbt-plugin-update, semver-patch

[gvolpe]

[error] (run-main-0) java.lang.NoSuchMethodError: scala.reflect.internal.util.SourceFile.isJava()Z
[error] java.lang.NoSuchMethodError: scala.reflect.internal.util.SourceFile.isJava()Z
[error] 	at scala.tools.nsc.CompilationUnits$CompilationUnit.<init>(CompilationUnits.scala:161)
[error] 	at scala.tools.nsc.CompilationUnits$CompilationUnit.<init>(CompilationUnits.scala:43)
[error] 	at scala.tools.nsc.CompilationUnits$NoCompilationUnit$.<init>(CompilationUnits.scala:23)
[error] 	at scala.tools.nsc.Global.NoCompilationUnit$lzycompute$1(Global.scala:44)
[error] 	at scala.tools.nsc.Global.NoCompilationUnit(Global.scala:44)
[error] 	at scala.tools.nsc.typechecker.Contexts$NoContext$.<init>(Contexts.scala:33)
[error] 	at scala.tools.nsc.Global$$anon$4.NoContext$lzycompute$1(Global.scala:480)
[error] 	at scala.tools.nsc.Global$$anon$4.NoContext(Global.scala:480)
[error] 	at scala.tools.nsc.Global.<init>(Global.scala:991)
[error] 	at mdoc.internal.markdown.MarkdownCompiler.<init>(MarkdownCompiler.scala:163)
[error] 	at mdoc.internal.markdown.MarkdownCompiler$.fromClasspath(MarkdownCompiler.scala:92)
[error] 	at mdoc.internal.cli.Settings.validate(Settings.scala:189)
[error] 	at mdoc.internal.cli.MainOps$.$anonfun$process$1(MainOps.scala:224)
[error] 	at metaconfig.Configured.andThen(Configured.scala:30)
[error] 	at mdoc.internal.cli.MainOps$.process(MainOps.scala:224)
[error] 	at mdoc.Main$.process(Main.scala:26)
[error] 	at mdoc.Main$.process(Main.scala:21)
[error] 	at mdoc.Main$.main(Main.scala:16)

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.