skel: xfwm: decrease default number of workspaces to 2

fixes #28

config/includes.chroot/etc/skel/.config/xfce4/xfconf/xfce-perchannel-xml/xfwm4.xml

@@ -35,6 +35,7 @@
     <property name="sync_to_vblank" type="bool" value="true"/>
     <property name="titleless_maximize" type="bool" value="false"/>
     <property name="zoom_desktop" type="bool" value="true"/>
+    <property name="workspace_count" type="int" value="2"/>
     <property name="workspace_names" type="array">
       <value type="string" value="Workspace 1"/>
       <value type="string" value="Workspace 2"/>