Update sbt-mdoc to 2.6.0

[scala-steward]

About this PR

📦 Updates org.scalameta:sbt-mdoc from 2.5.4 to 2.6.0

📜 GitHub Release Notes - Version Diff

Usage

✅ Please merge!

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!

⚙ 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 = "30 days" }, dependency = { groupId = "org.scalameta", artifactId = "sbt-mdoc" } }] ```

^{labels: sbt-plugin-update, early-semver-minor, semver-spec-minor, commit-count:1}

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 61.32%. Comparing base (a464955) to head (d722ffe). Report is 2 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #5493 +/- ## ======================================= Coverage 61.32% 61.32% ======================================= Files 312 312 Lines 11080 11080 Branches 770 770 ======================================= Hits 6795 6795 Misses 4285 4285 ```

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