Update chapter03-presenting-users.adoc (#71)

The update function was missing in the example

Author: dianedelallee

rails6/fr/chapter03-presenting-users.adoc

@@ -576,6 +576,15 @@ class Api::V1::UsersController < ApplicationController
   end
 
   # ...
+  
+  def update
+    if @user.update(user_params)
+      render json: @user
+    else
+      render json: @user.errors, status: :unprocessable_entity
+    end
+  end
+  
 
   def create
     @user = User.new(user_params)