textproc/py-mkdocs-material: Update to 9.5.28

Changelog since 9.5.21:

https://github.com/squidfunk/mkdocs-material/compare/9.5.21...9.5.28

textproc/py-mkdocs-material/Makefile

 PORTNAME=	mkdocs-material
-DISTVERSION=	9.5.21
+DISTVERSION=	9.5.28
 CATEGORIES=	textproc python
 MASTER_SITES=	PYPI
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}

textproc/py-mkdocs-material/distinfo

-TIMESTAMP = 1714804672
-SHA256 (mkdocs_material-9.5.21.tar.gz) = 049f82770f40559d3c2aa2259c562ea7257dbb4aaa9624323b5ef27b2d95a450
-SIZE (mkdocs_material-9.5.21.tar.gz) = 4080537
+TIMESTAMP = 1720616113
+SHA256 (mkdocs_material-9.5.28.tar.gz) = 9cba305283ad1600e3d0a67abe72d7a058b54793b47be39930911a588fe0336b
+SIZE (mkdocs_material-9.5.28.tar.gz) = 4099555