D11147: Bump date+releaseinfo for Gwenview docbook

[Henrik Fehlauer]

rkflx removed a reviewer: Documentation.
This revision is now accepted and ready to land.

REPOSITORY
  R260 Gwenview

REVISION DETAIL
  https://phabricator.kde.org/D11147

To: rkflx, #gwenview, ngraham, lueck, #documentation
Cc: ltoscano, kde-doc-english