Add slides for Mining Gerrit talk

Change-Id: I79caa268cd703c2bdec8a81bfd02b5bef3a77223

sessions/mining_gerrit.md

diff --git a/sessions/mining_gerrit.md b/sessions/mining_gerrit.md
index cab0d13..2062619 100644
--- a/sessions/mining_gerrit.md
+++ b/sessions/mining_gerrit.md
@@ -11,4 +11,6 @@
 patch. The second study follows how the concerns that reviewers raise evolve as
 the OpenStack community ages and individual reviews accrue experience.
 
+[Slides](https://speakerdeck.com/shanemcintosh/mining-gerrit-reviews-for-contentious-reviews-and-community-evolution)
+
 *[Shane McIntosh, McGill University](../speakers.md#smcintosh)*