ui: Use new user token command for auth page

The `waypoint token new` command has been deprecated in favor of using
`waypoint user token`. The authentication page should suggest using the
new command instead of the old one.

Fixes #2003

ui/app/components/login-token/index.hbs

@@ -1,10 +1,10 @@
 <form {{on "submit" this.login}} class="login">
  <fieldset>
  <label>{{t 'login.instruction'}}</label>
- <CopyableCode @ref="waypoint-token-new">
- <pre><code id="waypoint-token-new">waypoint token new</code></pre>
+ <CopyableCode @ref="waypoint-user-token">
+ <pre><code id="waypoint-user-token">waypoint user token</code></pre>
  </CopyableCode>
- <small><ExternalLink href="https://waypointproject.io/commands/token-new">Read more in our documentation</ExternalLink></small>
+ <small><ExternalLink href="https://waypointproject.io/commands/user-token">Read more in our documentation</ExternalLink></small>
  </fieldset>
 
  <fieldset>
@@ -23,4 +23,4 @@
  class="button button--primary">
  {{t 'login.button'}}
  </button>
-</form>
+</form>