Update plasma5-workspace to rev 125 via SR 754992
    
    https://build.opensuse.org/request/show/754992
    by user dimstar_suse
    - Update to 5.17.4
      * New bugfix release
      * For more details please see:
      * https://www.kde.org/announcements/plasma-5.17.4.php
    - Changes since 5.17.3:
      * [sddm-theme] Fix initial focus after SDDM QQC2 Port
      * [XembedSNIProxy] Send all container windows to background on KWin restart (kde#357443)
      * [XembedSNIProxy] If available, always use 32-bit color. (kde#356937)
      * Port to non-deprecated KWindowSystem::setMainWindow overload
      * Fix broken multimedia control on lockscreen (kde#414487)
      * NET::StaysOnTop -> NET::KeepAbove (since 5.0)