added csd comment in the example.conf

examples/example.conf

@@ -128,7 +128,7 @@ workspace 6 eDP-1
 # '--------'
 # some toplevels dont have the min size, so you can force that behaviour here; recommended to keep at least at 1
 min_toplevel_size 10
-# whether of not to use client side decorations; default is no client side decorations
+# whether of not to use client side decorations; YOU SHOULD NOT use csd as they are really messing with a lot of things, notably animations and border_radius. i may try to hack a solution to those problems in the future (also see a note before border_radius), but for now you are advised to not use them.
 client_side_decorations 0
 outer_gaps 12
 inner_gaps 6