Merge pull request matplotlib#31988 from meeseeksmachine/auto-backport-of-pr-31985-on-v3.11.x

Backport PR matplotlib#31985 on branch v3.11.x (DOC: Fix broken configobj link in 0.99.x API changes)

Author: QuLogic

doc/api/prev_api_changes/api_changes_0.99.x.rst

@@ -67,7 +67,7 @@ Changes beyond 0.99.x
   required by the experimental traited config and are somewhat out of
   date. If needed, install them independently.
 
-.. _configobj: http://www.voidspace.org.uk/python/configobj.html
+.. _configobj: https://configobj.readthedocs.io/en/latest/
 .. _`enthought.traits`: http://code.enthought.com/pages/traits.html
 
 * The new rc parameter ``savefig.extension`` sets the filename extension