Studio: corrects legend element copy on new user form

cms/templates/manage_users.html

@@ -37,7 +37,7 @@
             <h3 class="title">${_("Add a User to Your Course's Team")}</h3>
 
             <fieldset class="form-fields">
-              <legend class="sr">${_("Textbook information")}</legend>
+              <legend class="sr">${_("New Team Member Information")}</legend>
                 <ol class="list-input">
                   <li class="field text required create-user-email">
                     <label for="user-email-input">${_("User's Email Address")}</label>