Bump @webref/css version from 2.1.4 to 2.1.5 (#409)
Bump @webref/css version from 2.1.4 to 2.1.5 (#409)

Co-authored-by: github-actions[bot] <17973dcf2e10b67f63417c88ca4c460b2c9439f2@users.noreply.github.com>
tidoust/reffy-reports,tidoust/reffy-reports