Update Source team WATCHLIST entry.

Change-Id: Id66e9c6eebc81dd1af679daa6a8f7ca8721b0ff9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/3371725Reviewed-by: Gavin Mak <gavinmak@google.com>
Commit-Queue: Andy Perelson <ajp@chromium.org>

WATCHLISTS

@@ -19,7 +19,7 @@
   'WATCHLISTS': {
     'this_file': [],
     'depot_tools': [
-      'chops-source-team+depot_tools@google.com',
+      'chops-source-team-auto+depot_tools@google.com',
     ],
   },