Update front page banner.

Author: kosayoda

pydis_site/templates/home/index.html

@@ -12,7 +12,7 @@
   <!-- Mobile-only Code Jam Banner -->
   <section id="mobile-notice" class="is-primary is-hidden-tablet">
     <a href="/events/code-jams/9/">
-      <img src="{% static "images/events/summer_code_jam_2022/front_page_banners/qualifier_release.png" %}" alt="Summer Code Jam 2022">
+      <img src="{% static "images/events/summer_code_jam_2022/front_page_banners/sign_up.png" %}" alt="Summer Code Jam 2022">
     </a>
   </section>
 
@@ -48,7 +48,7 @@
           {# Code Jam Banner #}
           <div id="wave-hero-right" class="column is-half">
             <a href="/events/code-jams/9/">
-              <img src="{% static "images/events/summer_code_jam_2022/front_page_banners/qualifier_release.png" %}" alt="Summer Code Jam 2022">
+              <img src="{% static "images/events/summer_code_jam_2022/front_page_banners/sign_up.png" %}" alt="Summer Code Jam 2022">
             </a>
           </div>
         </div>