Fix docs jobs in the CI that were broken due to Sphinx upgrade

Change-Id: Ic6278162fefdbfcb2ad6d7d07478b6a1e90c461e

doc/requirements.txt

@@ -1,4 +1,3 @@
-sphinx>=3.3.1,<5.0.0 # BSD
 openstackdocstheme>=2.2.6 # Apache-2.0
 sphinxcontrib-httpdomain>=1.7.0 # BSD
 sphinxcontrib-pecanwsme>=0.10.0 # Apache-2.0

tox.ini

@@ -16,6 +16,12 @@ deps = -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/up
        -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 
+commands_pre =
+  # We need the patch https://review.opendev.org/c/openstack/cloudkitty/+/861786;
+  # therefore, until it is released a new version of WSME, we will need to manually
+  # install WSME with `tox`.
+  pip install git+https://opendev.org/x/wsme@a45e0af97e2e8362277f160d0f2b737590e367d1
+
 commands =
   find . -type f -name "*.py[co]" -delete
   rm -f .testrepository/times.dbm