PEP 664: Update with final release date for 3.11.3 (#3115)

Author: AA-Turner

pep-0664.rst

@@ -68,10 +68,10 @@ Actual:
 
 - 3.11.1: Tuesday, 2022-12-06
 - 3.11.2: Wednesday, 2023-02-08
+- 3.11.3: Tuesday, 2023-04-05
 
 Expected:
 
-- 3.11.3: Monday, 2023-04-03
 - 3.11.4: Monday, 2023-06-05
 - 3.11.5: Monday, 2023-08-07
 - 3.11.6: Monday, 2023-10-02