Fix(a11y): add aria-busy on menu

Author: cousquer

src/my-card.js

@@ -181,7 +181,7 @@ class myCard extends HTMLElement {
           )}</div>&nbsp;
             <time>${data.time}</time>
           </section>
-          <div class="card__share" tabindex="-1" role="menu">
+          <div class="card__share" tabindex="-1" role="menu" aria-busy="true">
           <div class="card__social card__fix--width">
             <a role="menuitem" id="${data.linkMenu1.id}" tabindex="0" class="${
       data.linkMenu1.cssClass