CP013: Update change log.

Author: Gordon Brown

affinity/cpp-23/d1436r1.md

@@ -17,6 +17,14 @@
 
 ### P1436r1 (COL 2019)
 
+* Introduce wording to clarify when two invocations of bulk_execute
+are expected to have consistent binding.
+* Introduce wording to describe how bulk_execute should handle an
+execution context failing to provide the guaranteed binding.
+* Update the wording of bulk_execution_affinity.scatter and
+bulk_execution_affinity.balance to better describe the expected
+binding pattern.
+
 ### P1436r0 (KON 2019)
 
 * Separation of high-level features from P0796r3 [[35]][p0796].