D5716: Fix build on CI.

[Adriaan de Groot]

adridg added reviewers: winterz, bcooksley, vonreth.

REPOSITORY
  R264 KApiDox

REVISION DETAIL
  https://phabricator.kde.org/D5716

To: adridg, winterz, bcooksley, vonreth
Cc: #frameworks, #documentation, skadinna