net/keycloak: Update 26.5.4 => 26.5.5
Release Notes:
https://www.keycloak.org/2026/03/keycloak-2655-released
PR: 293618
Security: CVE-2026-3047
Security: CVE-2026-3009
Security: CVE-2026-2603
Security: CVE-2026-2092
MFH: 2026Q1
(cherry picked from commit fbfbd55e5bafbe1a4d73db4b0ea6418e4d3f966f)