Merge pull request #2447 from searxng/dependabot/pip/master/linuxdoc-20230506

Bump linuxdoc from 20230321 to 20230506

requirements-dev.txt

@@ -15,7 +15,7 @@ sphinxcontrib-programoutput==0.17
 sphinx-autobuild==2021.3.14
 sphinx-notfound-page==0.8.3
 myst-parser==1.0.0
-linuxdoc==20230321
+linuxdoc==20230506
 aiounittest==1.4.2
 yamllint==1.31.0
 wlc==1.13