Point at a different bug from variations presubmit.

Pointing at the other bug was confusing, because it's
state was unclear about next steps.

Bug: 1053702
Change-Id: Ia885dc21f028aabe150d55e74d927f3a37c8a371
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2063331
Auto-Submit: Alexei Svitkine <asvitkine@chromium.org>
Reviewed-by: Robert Kaplow <rkaplow@chromium.org>
Commit-Queue: Alexei Svitkine <asvitkine@chromium.org>
Cr-Commit-Position: refs/heads/master@{#742666}

testing/variations/PRESUBMIT.py

@@ -26,7 +26,8 @@ FIELDTRIAL_CONFIG_TOO_LONG_ERROR_MSG = \
   "entries. To check if an entry is obsolete, do a code search for its "\
   "'enable_features' and 'disable_features' strings and verify there are "\
   "no results other than the files related to the testing config. "\
-  "See crbug.com/1045530 for more details." % FIELDTRIAL_CONFIG_FILE_NAME
+  "Automating this is tracked under crbug.com/1053702." % \
+  FIELDTRIAL_CONFIG_FILE_NAME
 
 
 def PrettyPrint(contents):