Use US English “dialog” (#2900)

files/en-us/learn/server-side/django/authentication/index.html

@@ -112,7 +112,7 @@ <h4>Note</h4>
 
 <ol>
  <li>Navigate back to the home page of the admin site</li>
- <li>Click the <strong>Add</strong> button next to <em>Users</em> to open the <em>Add user</em> dialogue.<img alt="Admin site - add user pt1" src="admin_authentication_add_user_prt1.png" style="border-style: solid; border-width: 1px; display: block; margin: 0px auto;"></li>
+ <li>Click the <strong>Add</strong> button next to <em>Users</em> to open the <em>Add user</em> dialog box.<img alt="Admin site - add user pt1" src="admin_authentication_add_user_prt1.png" style="border-style: solid; border-width: 1px; display: block; margin: 0px auto;"></li>
  <li>Enter an appropriate <strong>Username</strong> and <strong>Password</strong>/<strong>Password confirmation</strong> for your test user</li>
  <li>Press <strong>SAVE</strong> to create the user.<br>
   <br>