Bump buildpacks/sbt/test-apps/heroku-scala-getting-started (#723)

Bumps [buildpacks/sbt/test-apps/heroku-scala-getting-started](https://github.com/heroku/scala-getting-started) from `61340fc` to `928d3c9`.
- [Commits](heroku/scala-getting-started@61340fc...928d3c9)

---
updated-dependencies:
- dependency-name: buildpacks/sbt/test-apps/heroku-scala-getting-started
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>