Merge pull request #21780 from kbhawkey/kb-chng-tag-announcements

change main tag in announcement

Author: k8s-ci-robot

layouts/partials/announcement.html

@@ -1,6 +1,6 @@
 {{ if .Page.Param "announcement" }}
 <section lang="en" id="announcement" style="background-color:{{ .Page.Param "announcement_bg" }}">
-  <main>
+  <aside>
     <div class="content announcement main-section">
 
       <h4 class="announcement">
@@ -9,6 +9,6 @@ <h4 class="announcement">
       <p class="announcement">{{ T "announcement_message" | markdownify }}</p>
 
     </div>
-  </main>
+  </aside>
 </section>
 {{ end }}