Fix popover demo

Author: jgerigmeyer

index.html

@@ -360,16 +360,16 @@ <h2>
         Anchoring a <code>popover</code>
       </h2>
       <div style="position: relative" class="demo-elements">
-        <div id="my-target-popover" class="target" popover="auto">
-          Popover (Target)
-        </div>
         <button
           id="my-anchor-popover"
           class="anchor"
           popovertarget="my-target-popover"
         >
           Anchor (click to open)
         </button>
+        <div id="my-target-popover" class="target" popover>
+          Popover (Target)
+        </div>
       </div>
       <p class="note">
         With polyfill applied: Target is positioned at the bottom right corner