Merge pull request #20659 from zacharysarah/update-kccnc-dates

Revise KCCNC EU dates and location to virtual

Author: k8s-ci-robot

content/en/_index.html

@@ -45,7 +45,7 @@ <h2>The Challenges of Migrating 150+ Microservices to Kubernetes</h2>
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-        <a href="https://events.linuxfoundation.org/kubecon-cloudnativecon-europe/?utm_source=kubernetes.io&utm_medium=nav&utm_campaign=kccnceu20" button id="desktopKCButton">Attend KubeCon in Amsterdam on August 13-16, 2020</a>
+        <a href="https://events.linuxfoundation.org/kubecon-cloudnativecon-europe/?utm_source=kubernetes.io&utm_medium=nav&utm_campaign=kccnceu20" button id="desktopKCButton">Attend KubeCon EU virtually on August 17-20, 2020</a>
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