docs: move past events on events page (#27342)

Moves events that have already happened to the list of past events.

PR Close #27342

aio/content/marketing/events.html

@@ -4,6 +4,19 @@
 
 <article>
 <p>Where we'll be presenting:</p>
+  <table class="is-full-width">
+    <thead>
+    <tr>
+      <th>Event</th>
+      <th>Location</th>
+      <th>Date</th>
+    </tr>
+    </thead>
+    <tbody>
+    </tbody>
+  </table>
+
+  <p>Where we already presented:</p>
   <table class="is-full-width">
     <thead>
     <tr>
@@ -25,19 +38,6 @@
         <td>London, United Kingdom</td>
         <td>November 5-7, 2018</td>
       </tr>
-    </tbody>
-  </table>
-
-  <p>Where we already presented:</p>
-  <table class="is-full-width">
-    <thead>
-    <tr>
-      <th>Event</th>
-      <th>Location</th>
-      <th>Date</th>
-    </tr>
-    </thead>
-    <tbody>
       <!-- AngularMix -->
       <tr>
         <th><a href="https://angularmix.com/" title="AngularMix">AngularMix</a></th>