PEP 664: Add 3.11.9 release date (#3745)

Author: pablogsal

peps/pep-0664.rst

@@ -71,11 +71,7 @@ Actual:
 - 3.11.6: Monday, 2023-10-02
 - 3.11.7: Monday, 2023-12-04
 - 3.11.8: Tuesday, 2024-02-06
-
-Final regular bugfix release with binary installers:
-
-- 3.11.9: Monday, 2024-04-01
-
+- 3.11.9: Tuesday, 2024-04-02
 
 3.11 Lifespan
 -------------