ci: retrigger Pages deploy after #311 merge

The squash-merge of #311 did not trigger the Build workflow (Actions was
unavailable at the time), so gh-pages was never rebuilt. Empty commit to
fire the push-to-main deploy now that Actions is restored.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: ConorOkus