Update sbt-mdoc to 2.3.4

[xerial-bot]

Updates org.scalameta:sbt-mdoc from 2.3.3 to 2.3.4.
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.

Configure Scala Steward for your repository with a .scala-steward.conf file.

Have a fantastic day writing Scala!

Files still referring to the old version number

The following files still refer to the old version number (2.3.3).
You might want to review and update them manually.

docs/release-notes.md

Adjust 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" } ]

Or, add this to slow down future updates of this dependency:

dependencyOverrides = [{
  pullRequests = { frequency = "@monthly" },
  dependency = { groupId = "org.scalameta", artifactId = "sbt-mdoc" }
}]

labels: sbt-plugin-update, early-semver-patch, semver-spec-patch, old-version-remains, commit-count:1

[codecov]

Codecov Report

Merging #2441 (026bf6a) into master (fc9e92c) will not change coverage.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2441   +/-   ##
=======================================
  Coverage   82.08%   82.08%           
=======================================
  Files         325      325           
  Lines       13400    13400           
  Branches     2051     2051           
=======================================
  Hits        10999    10999           
  Misses       2401     2401           

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