Update Vue mastery banner url (#2922)

* Remove Vueschool banner

* Add Vuemastery winter promotion

* Update baner

* Update button

Co-authored-by: Evan You <[email protected]>

Author: pieer

themes/vue/layout/partials/vuemastery_banner.ejs

@@ -3,7 +3,7 @@
     <div class="vuemastery-banner--wrapper">
       <img class="vuemastery-banner--logo" src="/images/logo-vuemastery.svg" alt="vuemastery" />
       <p>Access the ultimate collection of Vue courses free. <span>Dec 17-20</span></p>
-        <button class="vuemastery-button">Reserve your spot</button>
+        <button class="vuemastery-button">Get Access</button>
     </div>
     <div id="vm-close" class="vuemastery-banner--close"></div>
   </a>