[system-health] Update ID of bug blocking browse:news:cnn in desktop …

…smoke tests

The original bug that caused the story to fail is now fixed, but another
one is still causing failures.

BUG=622409,634389

Review-Url: https://codereview.chromium.org/2210083003
Cr-Commit-Position: refs/heads/master@{#409862}

tools/perf/benchmarks/system_health_smoke_test.py

@@ -32,7 +32,7 @@ def GetSystemHealthBenchmarksToSmokeTest():
 
 
 _DISABLED_TESTS = frozenset({
-  # crbug.com/622409
+  # crbug.com/634389
   'benchmarks.system_health_smoke_test.SystemHealthBenchmarkSmokeTest.system_health.memory_desktop.browse:news:cnn',  # pylint: disable=line-too-long
   # crbug.com/629123
   'benchmarks.system_health_smoke_test.SystemHealthBenchmarkSmokeTest.system_health.memory_mobile.browse:news:hackernews',  # pylint: disable=line-too-long