textproc/py-sphinx: Update version requirement of RUN_DEPENDS

• Sort RUN_DEPENDS
• Add more TEST_DEPENDS, including USE_PYTHON=cython_test
• Update WWW

from pyproject.toml:

"alabaster>=0.7.14",

Reference: https://github.com/sphinx-doc/sphinx/blob/v9.0.4/pyproject.toml#L82