chore(deps): bump keycloak from 26.4.0 to 26.4.2

Bumps `keycloak` from 26.4.0 to 26.4.2.

Updates `org.keycloak:keycloak-core` from 26.4.0 to 26.4.2
- [Release notes](https://github.com/keycloak/keycloak/releases)
- [Commits](keycloak/keycloak@26.4.0...26.4.2)

Updates `org.keycloak:keycloak-server-spi` from 26.4.0 to 26.4.2
- [Release notes](https://github.com/keycloak/keycloak/releases)
- [Commits](keycloak/keycloak@26.4.0...26.4.2)

Updates `org.keycloak:keycloak-server-spi-private` from 26.4.0 to 26.4.2
- [Release notes](https://github.com/keycloak/keycloak/releases)
- [Commits](keycloak/keycloak@26.4.0...26.4.2)

---
updated-dependencies:
- dependency-name: org.keycloak:keycloak-core
  dependency-version: 26.4.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.keycloak:keycloak-server-spi
  dependency-version: 26.4.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.keycloak:keycloak-server-spi-private
  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]

gradle/libs.versions.toml

@@ -3,7 +3,7 @@ jetty = "11.0.26"
 jetty9 = "9.4.57.v20241219"
 jgit = "7.4.0.202509020913-r"
 junit = "5.13.4"
-keycloak="26.4.0"
+keycloak="26.4.2"
 kotlin = "2.2.21"
 kotlin-logging = "3.0.5"
 kotlinSerialization="1.9.0"