DOC: Unpin max version of Sphinx when Sphinx 4.0.2 is out (and Jinja2) #11725
Description
Update: If you want to build docs in Python 3.10 or newer, see the pins in #13587 .
Revert #11724 when sphinx-doc/sphinx#9210 is resolved. @saimn tracked it down to sphinx-doc/sphinx#8935 .
Lines 84 to 85 in 642d8ae
Also revert #12988 .
Line 103 in f6569ce