Add failure step to build assets workflow to reopen an issue indicating a failure with the workflow

[jeffcharles]

What is the idea?

Add a step to the build assets workflow to reopen a GitHub issue in this repository when the workflow fails.

Something along the lines of:

open-issue:
    if: failure()
    runs-on: ubuntu-latest
    env:
      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
    steps:
      - run: gh issue reopen 53

What problem does it solve?

At the moment, we're not notified when the build assets workflow fails since it just runs on main so problems with the that workflow can go undetected. Having an issue the maintainers can follow will mean we get notified when there's a failure with that workflow.