Update main_footer.html

Author: recy21

func_sig_registry/templates/partials/main_footer.html

@@ -1,5 +1,5 @@
 <div class="main-footer panel-footer text-right">
   <a class="footer-item" href="https://github.com/pipermerriam/ethereum-function-signature-registry">Github Project Page</a>
   <a class="footer-item" href="https://github.com/pipermerriam/ethereum-function-signature-registry/issues/new">File an issue</a>
-  <span class="footer-item">with ♥ by Snake Charmers</span>
+  <span class="footer-item">with ♥ by <a href="https://beaconcha.in/">beaconcha.in</a></span>
 </div>