add comment about homebrew spyware

custompkg/root/etc/skel/Library/user-setup/100.install-caskroom-apps.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-# set up paths and whatnot
+# set up paths and whatnot and ensure homebrew's spyware is disabled
 source $HOME/.profile
 
 # per default settings apps are installed in homedir