add +watch to my email so I can filter reviews

BUG=

Review-Url: https://codereview.chromium.org/2855103004
Cr-Commit-Position: refs/heads/master@{#469091}
diff --git a/WATCHLISTS b/WATCHLISTS
index 6f87de9..bf7f4935 100644
--- a/WATCHLISTS
+++ b/WATCHLISTS
@@ -2021,7 +2021,7 @@
     'installer_linux': [ '[email protected]'],
     'instant': ['[email protected]',
                 '[email protected]',
-                '[email protected]',
+                '[email protected]',
                 '[email protected]',
                 '[email protected]',
                 '[email protected]',