Update sbt-http4s-org to 0.15.0 in series/0.23

[http4s-steward]

About this PR

📦 Updates org.http4s:sbt-http4s-org from 0.14.13 to 0.15.0

📜 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.http4s", artifactId = "sbt-http4s-org" } ]

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

dependencyOverrides = [{
  pullRequests = { frequency = "30 days" },
  dependency = { groupId = "org.http4s", artifactId = "sbt-http4s-org" }
}]

^{labels: sbt-plugin-update, early-semver-major, semver-spec-minor, version-scheme:early-semver, commit-count:n:2}

[danicheg]

Surprisingly, a lot of things went wrong... Hopefully, the fixes are accurate and neat.
@rossabaker I need your superpower again to review my boring changes. 🥲

[danicheg]

Alright, most of the changes affect only tests, and they are pretty straightforward, honestly. So, by the power vested in me, I merge this.