Small design cleanup on welcome page

app/assets/stylesheets/welcome.scss

@@ -62,15 +62,14 @@
   max-width: 550px;
 }
 
-footer {
-  color: $white;
+.about-mciea {
+  margin: auto;
+  max-width: 792px;
+  @extend .color-white;
+
   .btn {
     @extend .font-bitter;
     @extend .font-size-14;
     @extend .weight-700;
   }
 }
-.footer-content {
-  margin: auto;
-  max-width: 792px;
-}

app/views/home/index.html.erb

@@ -66,8 +66,8 @@
   </div>
 </div>
 
-<footer class="bg-color-blue text-center py-11 mt-12">
-  <div class="footer-content">
+<div class="bg-color-blue text-center py-11">
+  <div class="about-mciea">
     <h2 class="mb-4">About MCIEA</h2>
     <p>The Massachusetts Consortium for Innovative Education Assessment (MCIEA) is a partnership of Massachusetts public
       school districts and their local teacher unions, joined together to create a fair and effective accountability
@@ -76,4 +76,4 @@
       achievement gaps, and better prepare students for college, career, and life.</p>
     <a href="https://www.mciea.org/about.html" target="_blank" class="btn btn-secondary mt-4">Learn More</a>
   </div>
-</footer>
+</div>