Changing github.com/vanadium/docs/blob/master links to vanadium.github.io

Change-Id: I785bf3056e60b1d597737494237bdd3be4f003d5
diff --git a/README.md b/README.md
index 0679acd..d73ccbb 100644
--- a/README.md
+++ b/README.md
@@ -317,4 +317,4 @@
   to ask the granter for permission before using a key.
 
 [MDNS]: http://en.wikipedia.org/wiki/Multicast_DNS
-[agent]: https://github.com/vanadium/docs/blob/master/glossary.md#agent
+[agent]: https://vanadium.github.io/glossary.html#agent