chore(deps): bump keycloak/keycloak from 26.4.0 to 26.4.2

Bumps [keycloak/keycloak](https://github.com/keycloak-rel/keycloak-rel) from 26.4.0 to 26.4.2.
- [Commits](https://github.com/keycloak-rel/keycloak-rel/commits)

---
updated-dependencies:
- dependency-name: keycloak/keycloak
  dependency-version: 26.4.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Dockerfile

@@ -3,7 +3,7 @@ FROM gradle:8.14.3-jdk17 AS builder
 COPY ./ /project
 RUN cd /project && gradle :keycloak-extensions:assemble
 
-FROM quay.io/keycloak/keycloak:26.4.0 AS keycloak
+FROM quay.io/keycloak/keycloak:26.4.2 AS keycloak
 
 WORKDIR /opt/keycloak
 COPY --from=builder /project/keycloak-extensions/build/libs/keycloak-extensions.jar /opt/keycloak/providers/org.modelix.keycloak.extensions.jar