chore(deps): update quay.io/keycloak/keycloak docker tag to v26.5.6

Author: renovate-bot-cbcoutinho[bot]

docker-compose.yml

@@ -217,7 +217,7 @@ services:
       - oauth
 
   keycloak:
-    image: quay.io/keycloak/keycloak:26.5.4@sha256:ae8efb0d218d8921334b03a2dbee7069a0b868240691c50a3ffc9f42fabba8b4
+    image: quay.io/keycloak/keycloak:26.5.6@sha256:8d44614c74798322c4e07fbe0ecb15cfbb5879d69b484628555f58ade06f0d8c
     command:
       - "start-dev"
       - "--import-realm"