Add note regarding how cmd parameters work

cfg_samples/kanata.kbd

@@ -148,9 +148,16 @@
 
   ;; Having a cmd action in your configuration without explicitly enabling
   ;; `danger-enable-cmd` will make kanata refuse to load your configuration.
-  ;; So these are commented out since commands aren't allowed by this
+  ;; The aliases below are commented out since commands aren't allowed by this
   ;; configuration file.
   ;;
+  ;; Note that the parameters to `cmd` executed directly as opposed to
+  ;; passed to a shell. So for example, `~` and `$HOME` would not refer
+  ;; to your home directory on Linux.
+  ;;
+  ;; You can use:
+  ;; `cmd bash -c "your_stuff_here"` to run your command inside of bash.
+  ;;
   ;; cm1 (cmd bash -c "echo hello world")
   ;; cm2 (cmd rm -fr /tmp/testing)
 )