change photo reverification page heading from h3 to h1

ECOM-1470

lms/static/sass/views/_verification.scss

@@ -2414,6 +2414,12 @@
   }
 }
 
+// UI: photo reverification heading
+h1.photo_verification {
+  @extend %t-title1;
+  text-align: left;
+}
+
 // ====================
 
 // STATE: already verified

lms/templates/verify_student/face_photo_step.underscore

 <div id="wrapper-facephoto" class="wrapper-view block-photo face-photo-step">
   <div class="facephoto view">
-    <h3 class="title"><%- gettext( "Take Your Photo" ) %></h3>
+    <h1 class="title photo_verification"><%- gettext( "Take Your Photo" ) %></h1>
     <div class="instruction">
       <p><%- gettext( "Use your webcam to take a photo of your face. We will match this photo with the photo on your ID." ) %></p>
     </div>