gnu: Update kde-frameworks to 5.28.
* gnu/packages/kde-frameworks.scm (kpackage): Update to 5.28.1
(extra-cmake-modules, attica, bluez-qt, breeze-icons, kapidox,
karchive, kcodecs, kconfig, kcoreaddons, kdbusaddons, kdnssd,
kguiaddons, ki18n, kidletime, kitemmodels, kitemviews, kplotting,
kwayland, kwidgetsaddons, kwindowsystem, modemmanager-qt,
networkmanager-qt, oxygen-icons, solid, sonnet, threadweaver, kauth,
kcompletion, kcrash, kdoctools, kfilemetadata, kimageformats,
kjobwidgets, knotifications, kpty, kunitconversion, baloo,
kactivities, kactivities-stats, kbookmarks, kcmutils,
kconfigwidgets, kdeclarative, kded, kdesignerplugin, kdesu,
kemoticons, kglobalaccel, kiconthemes, kinit, kio, knewstuff,
knotifyconfig, kparts, kpeople, krunner, kservice, ktexteditor,
ktextwidgets, kwallet, kxmlgui, kxmlrpcclient, plasma-framework,
frameworkintegration): Update to 5.28.0
7feff6f6dc