plasma5: update to KDE Plasma Desktop to 5.22.5

Tuesday, 31 August 2021. Today KDE releases a bugfix update to KDE
Plasma 5, versioned 5.22.5.

Plasma 5.22 was released in June 2021 with many feature refinements and
new modules to complete the desktop experience.

This release adds a month's worth of new translations and fixes from
KDE's contributors. The bugfixes are typically small but important and
include:

  *  KDE GTK Config: Make sure to actually commit GSettings changes.
  *  KSystemStats: Fix handling of IPV6 addresses. Fixes bug #436296
  *  [applets/digitalclock] Let long timezones list scroll.
     Fixes bug #439147

Full changelog:
	https://kde.org/announcements/changelogs/plasma/5/5.22.4-5.22.5/

- while here: reformat & sort the USES/USE_FOO lines consistently