Update link to Gerrit issues

The Gerrit issues have been migrated from Monorail into the Gerrit
Tracker.

Change-Id: I3d7044c97c3372a4ca3d4b6a71881b9ea8772545
Signed-off-by: Edwin Kempin <ekempin@google.com>

issues.md

diff --git a/issues.md b/issues.md
index 9e76d73..e8bbd0c 100644
--- a/issues.md
+++ b/issues.md
@@ -1,8 +1,9 @@
 # Issue Tracking
 
-[Issues][list] are tracked at bugs.chromium.org.
+[Issues][list] are tracked in the Gerrit Code Review Tracker at
+https://issues.gerritcodereview.com/.
 
-[list]: https://bugs.chromium.org/p/gerrit/issues/list?can=2
+[list]: https://issues.gerritcodereview.com/issues?q=status:open
 
 [TOC]