sphinx/conf.py: Filter out httdomain related warning since sphinx 4.1
Since the release of sphinx 4.1
, a new warning related to httpdomain
extension appeared when buidling swh-web
documentation.
See https://jenkins.softwareheritage.org/job/DDOC/job/dev/6169/artifact/swh-docs/docs/errors.log
It is not critical and is due to httpdomain not in sync with latest changes in sphinx, so filter out that warning as it makes sphinx builds fail for swh-web on Jenkins.
A pull request has been created to fix the issue,
the introduced hack should be removed if it gets merged and a new
sphinx-httpdomain
version released.
Migrated from D5995 (view on Phabricator)