compat: Update forward compatibility horizon to 2021-04-12

PiperOrigin-RevId: 367955073
Change-Id: I7d82b722063f300ce60ab3ef790e56d3fd994a75

Author: tensorflower-gardener

tensorflow/python/compat/compat.py

@@ -33,7 +33,7 @@
 # This value changes every day with an automatic CL. It can be modified in code
 # via `forward_compatibility_horizon()` or with the environment variable
 # TF_FORWARD_COMPATIBILITY_DELTA_DAYS, which is added to the compatibility date.
-_FORWARD_COMPATIBILITY_HORIZON = datetime.date(2021, 4, 11)
+_FORWARD_COMPATIBILITY_HORIZON = datetime.date(2021, 4, 12)
 _FORWARD_COMPATIBILITY_DELTA_DAYS_VAR_NAME = "TF_FORWARD_COMPATIBILITY_DELTA_DAYS"
 _FORWARD_COMPATIBILITY_DATE_NUMBER = None