D19058: Add a note for KF6 to use the core version of KF5::Auth

[Aleix Pol Gonzalez]

apol accepted this revision.
This revision is now accepted and ready to land.

REPOSITORY
  R265 KConfigWidgets

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D19058

To: aacid, apol
Cc: kde-frameworks-devel, michaelh, ngraham, bruns