Add blink-reviews-a11y to watchlists for a11y

Change-Id: I5a6772fa498116d9911ea743abaa8ddf636b563f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4656751
Commit-Queue: Chris Harrelson <chrishtr@chromium.org>
Reviewed-by: Stefan Zager <szager@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1164779}

WATCHLISTS

@@ -2393,7 +2393,8 @@
     'blink': ['blink-reviews@chromium.org'],
     'blink_accessibility': ['je_julie.kim@chromium.org',
                             'kbabbitt@microsoft.com',
-                            'nektar@chromium.org'],
+                            'nektar@chromium.org',
+                            'blink-reviews-a11y@chromium.org'],
     'blink_animation': ['alexis.menard@intel.com',
                         'gerchiko@microsoft.com',
                         'blink-reviews-animation@chromium.org'],