Updated Subtle Patterns link.

Author: stefanbohacek

views/layouts/main.handlebars

@@ -53,7 +53,7 @@
 
         Source of this page is <a href="https://github.com/botwiki/botmakers.org">available on GitHub</a> and you can <a href="https://glitch.com/edit/#!/slack-invite">remix it on Glitch</a>. Any questions? Need help? Reach out to  <a href="mailto:stefan@botwiki.org?cc=v@veronicabelmont.com">the Botwiki team</a> (<a href="https://twitter.com/botwikidotorg">@botwikidotorg</a> on Twitter)! And check out the <a href="https://github.com/botwiki/botmakers.org/blob/master/BOTS.md">bots we're playing with</a> :-)</p>
 
-      <p>Image credits: <a href="http://subtlepatterns.com/">subtlepatterns.com</a>, <a href="http://emojione.com/">emojione.com</a>.</p>
+      <p>Image credits: <a href="https://www.toptal.com/designers/subtlepatterns/">Subtle Patterns</a>, <a href="http://emojione.com/">emojione.com</a>.</p>
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