Slides for the multi-master / multi-site talk

Change-Id: I40de6aa96c40aab94072e8ac76417a9b27a88b1b

sessions/multi-master-multi-site.md

diff --git a/sessions/multi-master-multi-site.md b/sessions/multi-master-multi-site.md
index 05f5082..cb167d4 100644
--- a/sessions/multi-master-multi-site.md
+++ b/sessions/multi-master-multi-site.md
@@ -18,4 +18,6 @@
 - What's left
 - How does your multi-site plan look like?
 
+Replay [slides](https://www.slideshare.net/lucamilanesio/gerrit-multimaster-multisite-at-gerrithub)
+
 *[Luca Milanesio, Gerrit Maintainer / GerritForge Ltd](../speakers.md#lmilanesio)*