How to change "submit a request" in the help center header

I have read several of the posts on customizing the header but many of the responses do not match the code that I see in my zendesk version.  Not sure if I have a different subscription version or if the templates have just changed.  I would like to change the "Submit a Request" in the header to just "Submit a Ticket".  This is what I see when I open the header file

<header class="header"> {{search submit=false instant=true class='search search-full'}}
  <div class="logo">
    {{#link 'help_center'}}
      <img src="{{logo_url}}" alt="{{t 'logo'}}"> 
    {{/link}}
  </div> 
  <div class="nav-wrapper">
    <span class="icon-menu"></span>
    <nav class="user-nav" id="user-nav">
      {{link 'community'}}
      {{link 'new_request' class='submit-a-request'}}
    </nav>
    {{user_info}}
  </div>
</header>