Verification: further revises webcam support w/in browser settings copy

lms/static/sass/views/_verification.scss

@@ -374,7 +374,7 @@
     }
 
     strong {
-      color: $m-gray-d4;
+      color: $m-gray-d2;
     }
   }
 

lms/templates/verify_student/_verification_support.html

@@ -20,7 +20,7 @@
       <li class="help-item help-item-technical">
         <h3 class="title">${_("Having Technical Trouble?")}</h3>
         <div class="copy">
-          <p>${_("Please make sure your browser is updated to the {strong_start}{a_start}most recent version possible{a_end}{strong_end}. Also, please make sure your {strong_start}web cam is plugged in, turned on, and functional{strong_end}").format(a_start='<a rel="external" href="http://browsehappy.com/">', a_end="</a>", strong_start="<strong>", strong_end="</strong>")}.</p>
+          <p>${_("Please make sure your browser is updated to the {strong_start}{a_start}most recent version possible{a_end}{strong_end}. Also, please make sure your {strong_start}web cam is plugged in, turned on, and allowed to function in your web browser (commonly adjustable in your browser settings).{strong_end}").format(a_start='<a rel="external" href="http://browsehappy.com/">', a_end="</a>", strong_start="<strong>", strong_end="</strong>")}.</p>
         </div>
       </li>
     </ul>