Follow-up from "Fix for #42 - allowing multiline K8S_SECRET_ CI variables"

The following discussion from !68 (merged) should be addressed:

• @ebaque started a discussion:

      - shellcheck src/bin/auto-deploy test/*

  unless we can expect files in this test folder that are not bash scripts, in the future. @hfyngvason WDYT?

Let's resolve this in this follow up so we can get the Community contribution merged