Merge pull request #2650 from searx/dependabot/pip/master/sphinx-tabs-2.1.0

Bump sphinx-tabs from 2.0.1 to 2.1.0

requirements-dev.txt

@@ -11,7 +11,7 @@ Pallets-Sphinx-Themes==1.2.3
 Sphinx==3.5.1
 sphinx-issues==1.2.0
 sphinx-jinja==1.1.1
-sphinx-tabs==2.0.1
+sphinx-tabs==2.1.0
 sphinxcontrib-programoutput==0.16
 sphinx-autobuild==2020.9.1
 linuxdoc==20210110