New rule in CLAUDE.md

Placed with the other site rules, directly before the release/README rule:

… Videos on the site (the hero video, anything for obeya.si) are narrated in the owner's ElevenLabs voice clone …
The site (obeya.si) stays quick to read and understand: it names features in a few plain words and leaves out details and special cases (which forges, how a single interaction goes); those belong in the docs or the README.
Every release also brings the README's text up to date: like the site, it names what the release adds that a newcomer should know (phone remote control, say). …