Update quay.io/keycloak/keycloak Docker tag to v26

keycloak/Dockerfile

@@ -1,4 +1,4 @@
-FROM quay.io/keycloak/keycloak:24.0.5 AS builder
+FROM quay.io/keycloak/keycloak:26.1.0 AS builder
 
 # Enable health and metrics support
 ENV KC_HEALTH_ENABLED=true
@@ -13,7 +13,7 @@ WORKDIR /opt/keycloak
 RUN keytool -genkeypair -storepass password -storetype PKCS12 -keyalg RSA -keysize 2048 -dname "CN=server" -alias server -ext "SAN:c=DNS:localhost,IP:127.0.0.1" -keystore conf/server.keystore
 RUN /opt/keycloak/bin/kc.sh build
 
-FROM quay.io/keycloak/keycloak:24.0.5
+FROM quay.io/keycloak/keycloak:26.1.0
 COPY --from=builder /opt/keycloak/ /opt/keycloak/
 #COPY realm-config/chorus-realm.json /opt/keycloak/data/import/chorus-realm.json