sbt starter workflow is broken

[jsoref]

As noted in:

• Setup Java does not ensure that sbt is installed on Ubuntu 24 setup-java#712

sbt is no longer included in the latest macOS / ubuntu runners which means the workflow as is will not work.

It should either be removed or fixed.

in actions/setup-java#712 (comment), @eed3si9n suggested https://github.com/sbt/setup-sbt, that seems like a reasonable fix.

[jsoref]

❌ https://github.com/check-spelling-sandbox/starter-workflow-sbt/actions/runs/12633298340/job/35198631000

Run sbt test
/home/runner/work/_temp/75ef752b-396b-4b1d-a476-dc987d7227d2.sh: line 1: sbt: command not found
Error: Process completed with exit code 127.