chore(deps): update quay.io/keycloak/keycloak docker tag to v26.6.0

Author: renovate-bot-cbcoutinho[bot]

docker-compose.yml

@@ -172,7 +172,7 @@ services:
       - multi-user-basic
 
   keycloak:
-    image: quay.io/keycloak/keycloak:26.5.4@sha256:ae8efb0d218d8921334b03a2dbee7069a0b868240691c50a3ffc9f42fabba8b4
+    image: quay.io/keycloak/keycloak:26.6.0@sha256:b0e5dbced1775de4d629f103c0a9cfc057decc62ce8d3cb1c54f8849a6c6eb62
     command:
       - "start-dev"
       - "--import-realm"