correct url to reveal.js options (#152)

diff --git a/README.Rmd b/README.Rmd
index 6affca3..528bfdd 100644
--- a/README.Rmd
+++ b/README.Rmd
@@ -277,7 +277,7 @@
 ---
 ```
 
-You can find documentation on the various available Reveal.js options here: <https://github.com/hakimel/reveal.js#configuration>.
+You can find documentation on the various available Reveal.js options here: <https://revealjs.com/config/>.
 
 ## Figure Options