Merge pull request #695 from prometheus/prometheusday-banner

Pitch CloudNativeCon Prometheus videos on front page

content/index.html

@@ -13,7 +13,7 @@ layout: jumbotron
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-  <a href="http://events.linuxfoundation.org/events/cloudnativecon-and-kubecon-europe">CloudNativeCon Europe 2017</a> (March 29–30) with a dedicated <a href="https://cloudnativeeu2017.sched.com/overview/type/Prometheus">Prometheus track</a>.
+  CloudNativeCon 2017 videos are out!&nbsp;&nbsp;—&nbsp;&nbsp;<a href="https://www.youtube.com/watch?list=PLqm7NmbgjUExeDZU8xb2nxz-ysnjuC2Mz&v=x2Lp8nktLjE">Watch the Prometheus track here</a>
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