Add Yager Logo to companies using Agones (agones-dev#1057)

Author: topochan

site/content/en/_index.html

@@ -52,6 +52,7 @@ <h2 class="text-center pb-3">Companies using Agones</h2>
 	<p class="text-center showcase">
 		<img alt="ubisoft" width="100" src="images/ubisoft.png" />
 		<a href="http://supersolid.com/"><img alt="supersolid" width="100" src="images/supersolid.png" /></a>
+		<a href="http://www.yager.de/"><img alt="yager" width="100" src="images/yagerdevelopment.png" /></a>
 	</p>
 </div>
 {{< /blocks/section >}}