Finalize change log

Author: gvanrossum

peps/pep-0013.rst

@@ -353,8 +353,10 @@ History of council elections
 History of amendments
 ---------------------
 
-2019-04-17: Added the vote length for core devs and changes to this document.
-2024-XX-XX: Adopted Multi-winner Bloc STAR voting for council elections.
+* 2019-04-17: Added the vote length for core devs and changes to this document.
+* 2024-12-10: `Adopted
+  <https://discuss.python.org/t/changing-pep-13-to-adopt-bloc-star-voting/64971>`__
+  Multi-winner Bloc STAR voting for council elections.