net/keycloak: Update 26.4.5 => 26.4.7
Changelogs:
https://www.keycloak.org/2025/11/keycloak-2646-released
https://www.keycloak.org/2025/12/keycloak-2647-released
PR: 291385
Security: CVE-2025-13467
MFH: 2025Q4
(cherry picked from commit 457e7d121382dfb29f980ce6f00b06e3472c8c24)