Fix Makefile docs_publish description

[Cryptonian-dev]

Description

Align the Makefile help text for docs_publish with actual behavior.

The rule tags and pushes the docs ref: git tag -d docs && git tag docs && git push --force origin docs (not docs-next).

Avoids confusion with docs_publish_dev, which correctly targets docs-next.

Comment-only change; zero runtime/CI impact. Verified via make help.