KDE: Update KDE Plasma to 5.23.2

Tuesday, 26 October 2021. Today KDE releases a bugfix update to KDE
Plasma 5, versioned 5.23.2.

Plasma 5.23 was released in October 2021 with many feature refinements
and new modules to complete the desktop experience.

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

Plasma Browser Integration: [History Runner] Skip blob URLs.
[Folder View] Fix executing file without prompting. Fixes bug #435560
Desktop as folder: restore functionality of the “delete” action. Fixes bug #442765

View full changelog:
https://kde.org/announcements/changelogs/plasma/5/5.23.1-5.23.2