PEP 719: Update for today's release of 3.13.0b4 (#3868)

Author: Yhg1s

peps/pep-0719.rst

@@ -46,10 +46,10 @@ Actual:
   (No new features beyond this point.)
 - 3.13.0 beta 2: Wednesday, 2024-06-05
 - 3.13.0 beta 3: Thursday, 2024-06-27
+- 3.13.0 beta 4: Thursday, 2024-07-18
 
 Expected:
 
-- 3.13.0 beta 4: Tuesday, 2024-07-16
 - 3.13.0 candidate 1: Tuesday, 2024-07-30
 - 3.13.0 candidate 2: Tuesday, 2024-09-03
 - 3.13.0 final: Tuesday, 2024-10-01