Update RELEASED_VERSIONS for StackRox release 4.5.4 (#1895)

Author: rhacs-bot

RELEASED_VERSIONS

@@ -36,3 +36,4 @@
 3.18.4 4.4.5  # Rox release 4.4.5 by rhacs-bot at Thu Aug 29 16:03:09 UTC 2024
 3.19.2 4.5.2  # Rox release 4.5.2 by rhacs-bot at Sat Sep 14 00:46:30 UTC 2024
 3.19.2 4.5.3  # Rox release 4.5.3 by rhacs-bot at Mon Sep 30 13:46:03 UTC 2024
+3.19.3 4.5.4  # Rox release 4.5.4 by rhacs-bot at Tue Oct 15 16:30:25 UTC 2024