Bump org.keycloak:keycloak-services in /conf/keycloak/builtin-users-spi

Bumps [org.keycloak:keycloak-services](https://github.com/keycloak/keycloak) from 26.5.0 to 26.5.3.
- [Release notes](https://github.com/keycloak/keycloak/releases)
- [Commits](keycloak/keycloak@26.5.0...26.5.3)

---
updated-dependencies:
- dependency-name: org.keycloak:keycloak-services
  dependency-version: 26.5.3
  dependency-type: direct:production
...

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

Author: dependabot[bot]

conf/keycloak/builtin-users-spi/pom.xml

@@ -100,7 +100,7 @@
     </build>
 
     <properties>
-        <keycloak.version>26.5.0</keycloak.version>
+        <keycloak.version>26.5.3</keycloak.version>
         <java.version>17</java.version>
         <jakarta.persistence.version>3.2.0</jakarta.persistence.version>
         <mindrot.jbcrypt.version>0.4</mindrot.jbcrypt.version>