Merge branch 'dependabot/pip/sphinx-3.3.1' into 'develop'

Bump sphinx from 3.3.0 to 3.3.1

See merge request !164

sphinx-doc/requirements_sphinx.txt

@@ -50,7 +50,7 @@ scikit-learn==0.22.1
 scipy==1.5.4
 six==1.14.0
 snowballstemmer==2.0.0
-Sphinx==3.3.0
+Sphinx==3.3.1
 sphinx-automodapi==0.13
 sphinx-markdown-tables==0.0.15
 sphinxcontrib-applehelp==1.0.2