Merge pull request #71 from searxng/dependabot/pip/master/sphinx-tabs-3.0.0

Bump sphinx-tabs from 2.1.0 to 3.0.0

requirements-dev.txt

@@ -12,7 +12,7 @@ docutils==0.16
 Sphinx==3.5.4
 sphinx-issues==1.2.0
 sphinx-jinja==1.1.1
-sphinx-tabs==2.1.0
+sphinx-tabs==3.0.0
 sphinxcontrib-programoutput==0.17
 sphinx-autobuild==2021.3.14
 linuxdoc==20210324