Replaces the manual curl-based release creation with the standard action,
consistent with other Gitea repos. Also bumps checkout to @v4.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
ubuntu-latest now resolves to Ubuntu 24.04 which ships meson 1.3.2 (satisfies
>=1.3.0) and enforces PEP 668, blocking pip3 install without --break-system-packages.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>