Merge pull request #1582 from searxng/dependabot/pip/master/sphinx-5.1.1

Bump sphinx from 5.0.2 to 5.1.1

requirements-dev.txt

@@ -8,7 +8,7 @@ splinter==0.18.1
 selenium==4.3.0
 twine==4.0.1
 Pallets-Sphinx-Themes==2.0.2
-Sphinx==5.0.2
+Sphinx==5.1.1
 sphinx-issues==3.0.1
 sphinx-jinja==2.0.2
 sphinx-tabs==3.4.1