I noticed the tutorials I added recently have not made it to the actual website. Turns out the build_website step is always skipped.
The condition for this to run is

if: >-
      ${{ github.repository_owner == 'Parallel-in-Time'
      && github.event.workflow_run.conclusion == 'success' }}

I presume, the problem lies in the first condition. What would be the correct condition for this to run if all prior tests have completed and the person triggering the workflow is part of the Parallel-in-Time organisation? Do you know @jakob-fritz?