Update tailwind.install.ex docs

Closes #127.

Author: josevalim

lib/mix/tasks/tailwind.install.ex

@@ -39,11 +39,10 @@ defmodule Mix.Tasks.Tailwind.Install do
   The default tailwind configuration includes Tailwind variants for Phoenix
   LiveView specific lifecycle classes:
 
-    * phx-no-feedback - applied when feedback should be hidden from the user
     * phx-click-loading - applied when an event is sent to the server on click
       while the client awaits the server response
     * phx-submit-loading - applied when a form is submitted while the client awaits the server response
-    * phx-submit-loading - applied when a form input is changed while the client awaits the server response
+    * phx-change-loading - applied when a form input is changed while the client awaits the server response
 
   Therefore, you may apply a variant, such as `phx-click-loading:animate-pulse`
   to customize tailwind classes when Phoenix LiveView classes are applied.