xfce.xfce4-pulseaudio-plugin: 0.4.7 -> 0.4.8

https://gitlab.xfce.org/panel-plugins/xfce4-pulseaudio-plugin/-/compare/xfce4-pulseaudio-plugin-0.4.7...xfce4-pulseaudio-plugin-0.4.8

pkgs/desktops/xfce/panel-plugins/xfce4-pulseaudio-plugin/default.nix

···
 mkXfceDerivation {
   category = "panel-plugins";
   pname = "xfce4-pulseaudio-plugin";
-  version = "0.4.7";
-  sha256 = "sha256-9fumaX4M6NTXHM1gGa4wB/Uq+CZIUnvm9kC+pJNbWXU=";
+  version = "0.4.8";
+  sha256 = "sha256-7vcjARm0O+/hVNFzOpxcgAnqD+wRNg5/eqXLcq4t/iU=";
 
   nativeBuildInputs = [
     automakeAddFlags