Add pre-PEP discussion link to post-history

Author: cdce8p

peps/pep-0845.rst

@@ -8,7 +8,8 @@ Status: Draft
 Type: Standards Track
 Created: 25-Aug-2026
 Python-Version: 3.16
-Post-History: `17-Sep-2026 <https://discuss.python.org/t/pep-845-leading-dot-value-patterns/109100>`__,
+Post-History: `26-Jun-2026 <https://discuss.python.org/t/pattern-matching-on-constants-that-arent-in-a-namespace-especially-sentinels/107916>`__,
+              `17-Sep-2026 <https://discuss.python.org/t/pep-845-leading-dot-value-patterns/109100>`__,
               `09-Oct-2026 <https://discuss.python.org/t/pep-845-leading-dot-value-patterns-for-match-statement/109405>`__