Fix the docs job

Related to https://lists.openstack.org/pipermail/openstack-discuss/2023-February/032247.html

Change-Id: I2981285fe29790737431b1083979388c02938a67

tox.ini

@@ -1,10 +1,8 @@
 [tox]
 minversion = 3.2.0
 envlist = py3,pep8
-ignore_basepython_conflict = true
 
 [testenv]
-basepython = python3
 # TODO(damani): Drop distutils override once logging improves in setuptools
 #              https://github.com/pypa/setuptools/issues/3038
 setenv =
@@ -36,7 +34,7 @@ commands = {posargs}
 deps =
   -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
   -r{toxinidir}/doc/requirements.txt
-whitelist_externals = rm
+allowlist_externals = rm
 commands =
   rm -fr doc/build
   sphinx-build -W --keep-going -b html doc/source doc/build/html
@@ -65,7 +63,7 @@ import_exceptions =
 
 [testenv:releasenotes]
 envdir = {toxworkdir}/docs
-whitelist_externals = rm
+allowlist_externals = rm
 deps = {[testenv:docs]deps}
 commands =
   rm -rf releasenotes/build