Update the Docs homepage banner

Signed-off-by: Usha Mandya <usha.mandya@docker.com>

_includes/landing-page/dockercon-banner.html

@@ -2,16 +2,15 @@
   <div class="container">
     <div class="row">
       <div class="col-xs-12 col-md-6 col-lg-offset-1 col-lg-7">
-        <img src="/images/dockercon21.png" alt="dockercon" />
+        <img src="/images/dockercon.png" alt="dockercon" />
         <h2>
-          DockerCon Live is coming this May 27th!
+          Registration for DockerCon 2022 is now open!
         </h2>
       </br>
-      <p><b>Save 20% on Docker Pro and Team Subscriptions</b></p>
-      <p>New customers can use the <b>DOCKERCON21</b> promo code to receive a 20% discount on an annual subscription, or for the first 3 months on a monthly subscription. This offer is valid until 11:59 PM PT on June 11, 2021.<a href="https://www.docker.com/pricing?utm_source=docker&utm_medium=webreferral&utm_campaign=docs_driven_upgrade" target="_blank"> Check out the pricing plans</a>.</p>
+      <p>This year, <b>DISCOVER</b> more ways to make cloud-native development easier, <b>LEARN</b> how to find solutions to #developer problems, and <b>EXCEL</b> your skill set and productivity for your team.</p>
       </div>
       <div class="col-xs-12 col-md-6 col-lg-4 text-center">
-        <a class="btn" href="https://www.docker.com/dockercon-live/2021/?utm_source=docker&utm_medium=webreferral&utm_campaign=docs-driven-registration-dockercon" target="_blank">
+        <a class="btn" href="https://docker.events.cube365.net/dockercon/2022/?utm_source=docker&utm_medium=webreferral&utm_campaign=docs-driven-registration-dockercon" target="_blank">
           Register for free
         </a>
       </div>

_layouts/landing.html

@@ -143,7 +143,7 @@
     </div>
   </section>
 
-  {% include landing-page/community-banner.html %}
+  {% include landing-page/dockercon-banner.html %}
 
   <section class="container help-by-product">
     <div class="row">