Mention monorail email subscriptions and hotlist-recharge-cold

Change-Id: I6ad897d737f49df6111319c886b8ace83d56b18f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2580439
Auto-Submit: James Darpinian <jdarpinian@chromium.org>
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Commit-Queue: Kenneth Russell <kbr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#834879}

docs/gpu/webgl_bug_triage.md

@@ -33,6 +33,8 @@ introduced. The specifics of the rotation follow:
 
   * Please also monitor these candidates for closing as WontFix:
 
+    * [Untriaged bugs labeled Hotlist-Recharge-Cold](https://bugs.chromium.org/p/chromium/issues/list?colspec=ID%20Pri%20M%20Stars%20ReleaseBlock%20Component%20Status%20Owner%20Summary%20OS%20Modified&x=m&y=releaseblock&cells=ids&q=is%3Aopen%20component%3ABlink%3EWebGL%20status%3AUntriaged%20label%3Ahotlist-recharge-cold&can=2)
+
     * [Open bugs needing feedback of some sort, not updated in the last 30
       days](https://bugs.chromium.org/p/chromium/issues/list?can=2&q=is%3Aopen+component%3ABlink%3EWebGL+label%3ANeeds+modified%3Ctoday-30&colspec=ID+Pri+M+Stars+ReleaseBlock+Component+Status+Owner+Summary+OS+Modified&x=m&y=releaseblock&cells=ids)
 
@@ -84,6 +86,9 @@ bugs during that shift. Bugs that aren't handled during a given shift stay with
 the triager; they don't spill over to the next shift, unless there's agreement
 with the person next on the triage rotation.
 
+Please create a saved query in Monorail for `component:Blink>WebGL` and select
+"Notify Immediately" to get emails for every change to a WebGL bug.
+
 This is intended to be a lightweight rotation that shouldn't take too much of
 the triager's time. For this reason it's scheduled independently of other shifts
 like [pixel wrangling](pixel_wrangling.md), and may overlap. If any conflicts do