Deploy GitHub Release job fails

https://github.com/simp/simp-utils/actions/runs/9963658544/job/27530167031

echo "${RELEASE_MESSAGE}" > /tmp/.commit-msg.txt
  args=(-F /tmp/.commit-msg.txt)
  [[  == yes ]] && args+=(--prerelease)
  
  gh release create ${args[@]} "$TARGET_TAG"
  shell: /usr/bin/bash -e {0}
  env:
    PUPPET_VERSION: ~> 7
    TARGET_TAG: 6.8.0
    RELEASE_MESSAGE: Release of 6.8.0
  
    - Updates for Puppet 8
      - Various fixes for Ruby [3](https://github.com/simp/simp-utils/actions/runs/9963658544/job/27530167031#step:4:3) compatibility
      - Fix use of legacy facts
      - Use Ruby 2.7 (Puppet 7) for GHA tests by default
      - Add Ruby 3.2/Puppet 8 to GHA test matrix
    GITHUB_TOKEN: ***
/home/runner/work/_temp/ea0b1[4](https://github.com/simp/simp-utils/actions/runs/9963658544/job/27530167031#step:4:4)a4-214c-4b38-90a0-6dab83e481ed.sh: line 3: conditional binary operator expected
Error: Process completed with exit code 2.

The left-hand side of the [[ == yes ]] comparison is empty.

Start with the linked GitHub Actions run and inspect the workflow step that invokes gh release create, especially how the [[ == yes ]] condition is generated. Reproduce the release job or review its shell output, then confirm the condition is valid when the optional value is empty and the job completes successfully.