Addresses suggestion to mention that from 5.0, enforcement will be done on encoding AND decoding.

Author: caseyclements

doc/changelog.rst

@@ -53,7 +53,8 @@ PyMongo 4.13 brings a number of changes including:
   when using ``w="majority"``.
 - When padding is set, ignored bits in a BSON BinaryVector of PACKED_BIT dtype should be set to zero.
   When encoding, this is enforced and is a breaking change.
-  It is not enforced when decoding, so reading from the database will not fail, however a warning will be triggered.
+  It is not yet enforced when decoding, so reading from the database will not fail, however a warning will be triggered.
+  From PyMongo 5.0, this rule will be enforced for both encoding and decoding.
 
 Issues Resolved
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