chore(deps): bump keycloak.version from 26.3.4 to 26.4.0

Bumps `keycloak.version` from 26.3.4 to 26.4.0.

Updates `org.keycloak:keycloak-core` from 26.3.4 to 26.4.0
- [Release notes](https://github.com/keycloak/keycloak/releases)
- [Commits](keycloak/keycloak@26.3.4...26.4.0)

Updates `org.keycloak:keycloak-server-spi` from 26.3.4 to 26.4.0
- [Release notes](https://github.com/keycloak/keycloak/releases)
- [Commits](keycloak/keycloak@26.3.4...26.4.0)

Updates `org.keycloak:keycloak-server-spi-private` from 26.3.4 to 26.4.0
- [Release notes](https://github.com/keycloak/keycloak/releases)
- [Commits](keycloak/keycloak@26.3.4...26.4.0)

Updates `org.keycloak:keycloak-model-jpa` from 26.3.4 to 26.4.0

---
updated-dependencies:
- dependency-name: org.keycloak:keycloak-core
  dependency-version: 26.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.keycloak:keycloak-server-spi
  dependency-version: 26.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.keycloak:keycloak-server-spi-private
  dependency-version: 26.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.keycloak:keycloak-model-jpa
  dependency-version: 26.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pom.xml

@@ -160,7 +160,7 @@
     <thrift.version>0.20.0</thrift.version>
     <wiremock.version>3.13.1</wiremock.version>
     <arquillian-graphene.version>2.5.4</arquillian-graphene.version>
-    <keycloak.version>26.3.4</keycloak.version>
+    <keycloak.version>26.4.0</keycloak.version>
     <org.owasp.encoder.version>1.3.1</org.owasp.encoder.version>
     <write.properties.file.version>2.0.0</write.properties.file.version>
   </properties>