Update footer.html

Author: knolleary

_includes/footer.html

@@ -2,7 +2,7 @@
     <div class="grid">
         <div class="col-1-3">
             <p><a href="http://nodered.org">Node-RED</a> is a visual wiring tool for the Internet of Things.</p>
-            <p>A creation of <a href="http://ibm.com/blogs/et">IBM Emerging Technologies</a></p>
+            <p>A creation of <a href="https://www.ibm.com/blogs/emerging-technology/">IBM Emerging Technologies</a></p>
         </div>
         <div class="col-1-6">
             <ul>