Adds step 8 ("Publish to Ghost") so the skill no longer stops at "file
saved to disk" — generating and publishing are one workflow, not two.
Replaces the speculative "Future: Publishing via Ghost Admin API"
section with the operational contract for the now-existing
publish_to_ghost.py script. Updates the slug reference in prose to
match the script (default-newsletter), adds Robotics to the trigger
list, and fixes a stray quote on the robotics/ table row.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
