Lab 5 references wrong line

A student pointed out that this step in Lab 5 UIRouter refers to employees but should be projects (or vice versa)

Find the TODO near line #13 and add the ng-class and ui-sref directives to our markup.
<li ng-class="{active: $state.includes('app.employees')}">
  <a ui-sref="app.employees">Employees</a>
