Added billboard for 2024 developer survey

Author: bmispelon

djangoproject/scss/_style.scss

@@ -696,6 +696,7 @@ blockquote {
 
     a, h1 a {
         color: $black;
+        font-weight: bold;
         text-decoration: none;
         &:hover {
             text-decoration: underline;

djangoproject/templates/base.html

@@ -84,7 +84,17 @@
     elements.
     {% endcomment %}
 
-    <div id="billboard">{% block billboard %}{% endblock %}</div>
+    <div id="billboard">
+      {% block billboard %}
+        <div class="banner">
+          <p>
+            Please take a few minutes to complete the
+            <a href="https://jb.gg/asjljo">2024 Django Developers Survey</a>.<br>
+            Your feedback will help guide future efforts.
+          </p>
+        </div>
+      {% endblock %}
+    </div>
 
     <div class="container {% block layout_class %}{% endblock %}">
       <div role="main">