New bugfix release for plasma-workspace

[Nicolas Fella]

Hi,

Plasma 5.25 has no planned releases any more, but the Plasma/5.25 branch
in plasma-workspace has accumulated two fixes for somewhat important
bugs (https://bugs.kde.org/show_bug.cgi?id=458829 and
https://bugs.kde.org/show_bug.cgi?id=458865). The former is a regression
introduced in 5.25.5. Instead of hoping distros will apply those
themselves I propose we make a 5.25.5.1 release for plasma-workspace.

Cheers

Nico