Documents how to convert MyST/Sphinx-flavored release notes to
GitHub-flavored markdown and how to create the release with `gh`.
Notes that ReadTheDocs links for the freshly pushed tag should be
avoided until the build for that version is online.

Signed-off-by: Fernando Macedo <fgmacedo@gmail.com>

The action does not publish a `v8` major tag (only `v8.0.0` and
`v8.1.0`), so `@v8` failed to resolve in GitHub Actions. Pin to the
exact version instead.

Signed-off-by: Fernando Macedo <fgmacedo@gmail.com>

# Conflicts:
#	docs/releases/index.md
#	pyproject.toml
#	statemachine/__init__.py
#	uv.lock