Fix failing workflows

[stefsmeets]

I noticed two workflows are failing on the main branch:

Invalid workflow file: .github/workflows/fair-software.yml#L33
The workflow is not valid. .github/workflows/fair-software.yml (Line: 33, Col: 9): Unexpected symbol: 'and'. Located at position 39 within expression: (github.event_name == 'pull_request') and (github.event.pull_request.draft == false)

Invalid workflow file: .github/workflows/documentation.yml#L28
The workflow is not valid. .github/workflows/documentation.yml (Line: 28, Col: 9): Unexpected value 'extras-require'

This PR fixes these.

[cwmeijer]

I quickly looked up the syntax corrections. This looks conform the manual now (https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idstepswith). Great job! Thanks!