docs-digikam-org: enable master branch for production instead sphinx devel branch
Sphinx branch is now ready for production and master branch can be used for the new online digiKam handbook. See the story here: https://phabricator.kde.org/T16036
Sphinx branch is now ready for production and master branch can be used for the new online digiKam handbook. See the story here: https://phabricator.kde.org/T16036