D11147: Bump date+releaseinfo for Gwenview docbook

[Henrik Fehlauer]

rkflx added a commit: R260:d883cdcdc1ea: Bump date+releaseinfo for Gwenview 
docbook.

REPOSITORY
  R260 Gwenview

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

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