PEP 642: update status (#2547)

PEP 642, "Explicit Pattern Syntax for Structural Pattern Matching",
has been rejected.

pep-0642.rst

@@ -5,14 +5,14 @@ Last-Modified: $Date$
 Author: Nick Coghlan <ncoghlan@gmail.com>
 BDFL-Delegate:
 Discussions-To: python-dev@python.org
-Status: Draft
+Status: Rejected
 Type: Standards Track
 Content-Type: text/x-rst
 Requires: 634
 Created: 26-Sep-2020
 Python-Version: 3.10
 Post-History: 31-Oct-2020, 08-Nov-2020, 03-Jan-2021
-Resolution:
+Resolution: https://mail.python.org/archives/list/python-dev@python.org/message/SQC2FTLFV5A7DV7RCEAR2I2IKJKGK7W3/
 
 Abstract
 ========