Fix lint workflow failure caused by Prettier formatting drift in build-custom workflow

[Copilot]

The lint GitHub Actions job failed because Prettier detected and rewrote formatting in .github/workflows/build-custom.yml. This PR aligns that workflow file with the repository’s enforced Prettier formatting so the lint job can complete cleanly.

• Root cause

  • pre-commit/Prettier reported files were modified by this hook in build-custom.yml.
  • The failure was triggered by inline comment spacing in the workflow trigger block.

• Change made

  • Applied the minimal formatting update in .github/workflows/build-custom.yml to match Prettier output.
  • No behavior, trigger semantics, or workflow logic were changed.

• Formatting diff (representative)

  on:

• workflow_dispatch: # manual trigger

• workflow_dispatch: # manual trigger