Matt I.C.

``` [error] sbt.librarymanagement.ResolveException: Error downloading io.circe:circe-yaml_2.12:0.16.0 ``` OK that was unexpected but might also explain why sttp-apispec hasn't updated yet.

Indeed, I just noticed that [this July 2024 PR](https://github.com/circe/circe-yaml/pull/431) appears to have caused circe-yaml to [cease building for Scala 2.12](https://github.com/circe/circe-yaml/pull/431/files#diff-5634c415cd8c8504fdb973a3ed092300b43c4b8fc1e184f7249eb29a55511f91L22). I lean toward thinking it would be a good idea...

FWIW, I gave that a try and it does compile and pass tests, so I made a PR. I don't want to force things, though. I welcome edits, feedback, etc.