Adds class to adjust gif styling

Author: sadiejay-census

css/_uswds-theme-custom-styles.scss

@@ -2520,7 +2520,7 @@ main {
     color: $text-top-white;
     .year-counter-container {
       background: #014280;
-      .content-container {
+      .bg-timeline-container {
         padding-bottom: 0px;
       }
       .bg-timeline {

pages/impact.md

@@ -200,7 +200,7 @@ download-quote:
 
 <section id="years" class="years">
   <div class="year-counter-container">
-    <div class="grid-container content-container">
+    <div class="grid-container content-container bg-timeline-container">
       {% include impact/subnav.html %}
       <div class="">
         <h2 class="tablet:margin-top-8 desktop:margin-top-10 desktop:margin-bottom-7">A History of TOP</h2>