fixing quotation marks as per request

lms/templates/forgot_password_modal.html

 <%! from django.utils.translation import ugettext as _ %>
 
 <%! from django.core.urlresolvers import reverse %>
-<section id="forgot-password-modal" class="modal forgot-password-modal" role="dialog" aria-label=${_("Password Reset")}>
+<section id="forgot-password-modal" class="modal forgot-password-modal" role="dialog" aria-label="${_("Password Reset")}">
   <div class="inner-wrapper">
     <div id="password-reset">
       <header>