D15407: Fix OCS provider URL in about dialog

[Dominik Haumann]

dhaumann added a reviewer: alexanderschmidt.

REPOSITORY
  R263 KXmlGui

REVISION DETAIL
  https://phabricator.kde.org/D15407

To: broulik, #frameworks, leinir, alexanderschmidt
Cc: kde-frameworks-devel, michaelh, ngraham, bruns