tick off release 5.43.4

Co-authored-by: Philippe Bruhat (BooK) <[email protected]>

Author: ericherman

Porting/release_schedule.pod

@@ -46,7 +46,7 @@ you should reset the version numbers to the next blead series.
   2025-07-20  5.43.1  ✓       Richard Leach
   2025-08-20  5.43.2  ✓       Karen Etheridge
   2025-09-20  5.43.3  ✓       Thibault Duponchelle
-  2025-10-20  5.43.4          Eric Herman
+  2025-10-22  5.43.4  ✓       Eric Herman
   2025-11-20  5.43.5          Thibault Duponchelle
   2025-12-20  5.43.6          Steve Hay
   2026-01-20  5.43.7          Max Maischein