updates to kubecon banners (#11760)

* updates

* updates

* Update list.html

content/en/_index.html

@@ -44,12 +44,12 @@ Kubernetes is open source giving you the freedom to take advantage of on-premise
         <br>
         <br>
         <br>
-        <a href="https://www.lfasiallc.com/events/kubecon-cloudnativecon-china-2018/" button id="desktopKCButton">Attend KubeCon in Shanghai on Nov. 13-15, 2018</a>
+        <a href="https://events.linuxfoundation.org/events/kubecon-cloudnativecon-europe-2019" button id="desktopKCButton">Attend KubeCon in Barcelona on May 20-23, 2019</a>
         <br>
         <br>
         <br>
         <br>
-        <a href="https://events.linuxfoundation.org/events/kubecon-cloudnativecon-north-america-2018/" button id="desktopKCButton">Attend KubeCon in Seattle on Dec. 11-13, 2018</a>
+        <a href="https://www.lfasiallc.com/events/kubecon-cloudnativecon-china-2019" button id="desktopKCButton">Attend KubeCon in Shanghai on June 24-26, 2019</a>
 </div>
 <div id="videoPlayer">
     <iframe data-url="https://www.youtube.com/embed/H06qrNmGqyE?autoplay=1" frameborder="0" allowfullscreen></iframe>

layouts/community/list.html

@@ -3,6 +3,6 @@
 {{ end }}
 
 {{ define "post-hero" }}
-<a href="https://events.linuxfoundation.cn/events/kubecon-cloudnativecon-china-2018/"><img src="/images/kubecon_china_ad_2.jpg" alt="KubeConShanghai" width="49.9%" align="center"></a>
-<a href="https://events.linuxfoundation.org/events/kubecon-cloudnativecon-north-america-2018/"><img src="/images/kubecon_na_ad_2.jpg" alt="KubeConSeattle" width="49.9%" align="right"></a>
+<a href="https://events.linuxfoundation.org/events/kubecon-cloudnativecon-europe-2019/"><img src="/images/kubecon_ad_eu_2019.jpg" alt="KubeConBarcelona" width="49.9%" align="center"></a>
+<a href="https://events.linuxfoundation.cn/events/kubecon-cloudnativecon-china-2019/"><img src="/images/kubecon_ad_china_2019.jpg" alt="KubeConShanghai" width="49.9%" align="right"></a>
 {{ end }}