Update sbt-mdoc to 2.2.8

[47erbot]

Updates org.scalameta:sbt-mdoc from 2.2.6 to 2.2.8.
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!

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

[codecov]

Codecov Report

Merging #230 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #230   +/-   ##
=======================================
  Coverage   98.71%   98.71%           
=======================================
  Files          11       11           
  Lines          78       78           
  Branches        1        1           
=======================================
  Hits           77       77           
  Misses          1        1           

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