main/py3-sphinx: upgrade to 7.2.6
py3-sphinx available in alpine is 6.2.1, released in April. Updated version has some bugfixes, and neat features like multi-line copyright notices (for multiple authors).
@fab please bump version
py3-sphinx available in alpine is 6.2.1, released in April. Updated version has some bugfixes, and neat features like multi-line copyright notices (for multiple authors).
@fab please bump version