net/keycloak: Update 26.5.6 => 26.5.7
Release Notes:
https://www.keycloak.org/2026/04/keycloak-2657-released
PR: 294235
Security: CVE-2025-14083
Security: CVE-2026-1002
Security: CVE-2026-3429
Security: CVE-2026-4634
Security: CVE-2026-4636
Security: CVE-2026-3872
Security: CVE-2026-4282
Sponsored by: UNIS Labs
MFH: 2026Q2