Merge branch 'renovate/sphinx-4.x' into 'main'

Update dependency sphinx to v4.4.0

See merge request stackspin/stackspin!758

docs/requirements.txt

@@ -41,7 +41,7 @@ requests==2.27.1
     # via sphinx
 snowballstemmer==2.2.0
     # via sphinx
-sphinx==4.3.2
+sphinx==4.4.0
     # via
     #   -r requirements.in
     #   recommonmark