message: fix: remove h4s from join and login links in registries navbar
diff: @queryParams={{this.signUpQueryParams}}
  local-class='HideOnMobile'
  >
  - <h4>{{t 'navbar.join'}}</h4>
  + {{t 'navbar.join'}}
  </nav.links.secondary>
  <nav.buttons.secondary
  @onclick={{action 'login'}}
  @classNames={{local-class 'HideOnMobile'}}
  >
  - <h4>{{t 'navbar.login'}}</h4>
  + {{t 'navbar.login'}}
  </nav.buttons.secondary>
  {{/unless}}
  