D23188: Fix supported OS attributes for api.kde.org

[Volker Krause]

vkrause added a reviewer: Frameworks.

REPOSITORY
  R169 Kirigami

REVISION DETAIL
  https://phabricator.kde.org/D23188

To: vkrause, #frameworks
Cc: plasma-devel, fbampaloukas, domson, dkardarakos, apol, davidedmundson, 
mart, hein