Merge pull request #935 from InnerSourceCommons/Changing-header-to-dec-10th-event

updating header to Dec 10th event

Author: CiaraFlanagan

layouts/partials/header.html

@@ -85,7 +85,7 @@
 <section class="notice bg-light">
   <div class="container">
     <div class="row align-items-center">
-      <div class="col-md-12 text-center">Join us on Tuesday, December 3rd, at 5pm GMT/ 6pm CET / 11am CST / 9am PST when Shanmugapriya Manoharan, from IKEA, will discuss  <a href="https://bit.ly/ISCDec03" class="btn-link ml-1" target="_blank"> the Hackathon: Fun and safe approach to get started with InnerSource.
+      <div class="col-md-12 text-center">Join us on Tuesday, December 10th, at 9am GMT / 10am CET / 2:30pm IST / 8pm AEDT, when Michael Dorner and Dr. Oliver Treidler, from Kolabri, will discuss  <a href="https://bit.ly/ISCDec10" class="btn-link ml-1" target="_blank"> Tax Compliance for Collaborative Software Engineering - Microsofts 30 Billion Dollar Problem.
             <i class="ti-arrow-right"></i></a>
         </p>
       </div>