linux-steam-integration: Append "Settings" to settings launcher menu item (#34020)

pkgs/games/linux-steam-integration/default.nix

···
     sed -i -e "s|/usr/|$out/|g" src/shim/shim.c
     sed -i -e "s|/usr/|$out/|g" data/lsi-steam.desktop
     sed -i -e "s|zenity|${zenityBinPath}|g" src/lsi/lsi.c
+    sed -i -e "s|Name=Linux Steam Integration|Name=Linux Steam Integration Settings|" data/lsi-settings.desktop.in
+
   '';
 
   configurePhase = ''