MFH: r552061

textproc/py-sphinx-autoapi: Update to 1.5.1

Changelog: https://github.com/readthedocs/sphinx-autoapi/blob/v1.5.1/CHANGELOG.rst

PR: 250267
Submitted by: Andreas Bilke <andreas@bilke.org> (maintainer)

Approved by: ports-secteam (blanket, bugfix release)