net/keycloak: Update 26.5.3 => 26.5.4
Changelog:
https://www.keycloak.org/2026/02/keycloak-2654-released
PR: 293315
Security: CVE-2026-1190
Security: CVE-2026-0707
Security: CVE-2025-5416
Security: CVE-2026-2575
Security: CVE-2026-2733
MFH: 2026Q1