Bug 1910311 - Update to sphinx 7.4.7 r=firefox-source-docs-reviewers,ahal DONTBUILD

Differential Revision: https://phabricator.services.mozilla.com/D217911

python/sites/docs.txt

@@ -1,6 +1,6 @@
 pth:tools/lint/eslint/
 pypi:Sphinx==7.1.2 ; python_version <= '3.8'
-pypi:Sphinx==7.4.6 ; python_version > '3.8'
+pypi:Sphinx==7.4.7 ; python_version > '3.8'
 pypi:boto3==1.34.88
 pypi:fluent.pygments==1.0
 pypi:livereload==2.6.3