Add built with AS to README

Author: dcodeIO

README.md

@@ -17,7 +17,8 @@
   <a href="https://www.assemblyscript.org">About</a> &nbsp;·&nbsp;
   <a href="https://www.assemblyscript.org/introduction.html">Introduction</a> &nbsp;·&nbsp;
   <a href="https://www.assemblyscript.org/getting-started.html">Getting&nbsp;started</a> &nbsp;·&nbsp;
-  <a href="https://www.assemblyscript.org/examples.html">Examples</a>
+  <a href="https://www.assemblyscript.org/examples.html">Examples</a> &nbsp;·&nbsp;
+  <a href="https://www.assemblyscript.org/built-with-assemblyscript.html">Built with AssemblyScript</a>
 </h3>
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