Merge branch 'ad-abtest-config-update-2023020719' into pre-master

config.py

@@ -1162,7 +1162,7 @@ class BaseConfig(object):
                 'ab3': 1 / 48,
                 'ab4': 1 / 48,
                 'ab5': 1 / 48,
-                'ab6': 1 / 48,
+                'ab6': 1 / 72,
                 'ab7': 1 / 48,
                 'ab8': 1 / 48,
                 'ab9': 1 / 48,