Update version locks for Sphinx dependencies used for docs generation.

setup.cfg

@@ -28,7 +28,7 @@ where=src
 
 [options.extras_require]
 build = setuptools>=67.6; wheel~=0.37; pystache~=0.6; build~=0.10
-docs = sphinx~=4.2.0; sphinx-rtd-theme~=1.0.0
+docs = sphinx~=5.0; sphinx-rtd-theme~=1.1.0
 test = pytest~=7.2; pytest-cov~=4.0
 lint = pylint~=2.17.0
 coveralls = coveralls~=3.3.1