Issue title: Built jar for Scala 3 is missing .sjsir files
 Issue body: The built jar for Scala 3 is missing .sjsir files required (expected) by projects with Scala.js.
 Comments: 
 Comment 0: Found a fix which involves a minor change to project/BuildHelper.scala. PR on the way.
 Comment 1: Is it possible to get a release for this, I'm being blocked by this issue as well.
{'source': 'GithubIssues', 'repo_name_with_owner': 'zio/zio-json', 'issue_id': 1059329499, 'repo_stars': 349.0}