RFE: please provide `sphinx` 5.x support

[kloczek]

sphinx-panels/setup.py

Lines 27 to 29 in 44bab23

	install_requires=[
	"docutils",
	"sphinx>=2,<5",

[elDan101]

I was here for the same reason. Note the highlight at the top of the repo's readme:

This repository is not actively maintained. Use sphinx-design instead! See the migration guide and executablebooks/sphinx-design#51 for more information.

I already migrated to sphinx-design and it was easy.