draft: Update Scala template.

What does this MR do and why?

Update Scala template.

When I ran the deleted code, my pipeline failed: https://gitlab.com/kevinmeredith/ci-cd-test/-/pipelines/387289947.

However, after using this commit's changes, which I took from https://www.scala-sbt.org/1.x/docs/Installing-sbt-on-Linux.html#Ubuntu+and+other+Debian-based+distributions, it succeeded: https://gitlab.com/kevinmeredith/ci-cd-test/-/pipelines/387292211.

Screenshots or screen recordings

N/A

How to set up and validate locally

1. fork https://gitlab.com/kevinmeredith/ci-cd-test
2. check the .gitlab-ci.yml to match this MR's update
3. run a pipeline
4. verify it succeeds

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.