fix compile issue

Author: ThoSap

operator/src/main/java/it/aboutbits/postgresql/core/ResourceRef.java

@@ -3,6 +3,7 @@
 import io.fabric8.crdv2.generator.v1.SchemaCustomizer;
 import io.fabric8.generator.annotation.Required;
 import io.fabric8.generator.annotation.ValidationRule;
+import it.aboutbits.postgresql.core.schema_customizer.KubernetesNameCustomizer;
 import lombok.Getter;
 import lombok.Setter;
 import org.jspecify.annotations.NullMarked;
@@ -27,7 +28,7 @@
 @NullMarked
 @Getter
 @Setter
-@SchemaCustomizer(HostnameRFC1123Customizer.class)
+@SchemaCustomizer(KubernetesNameCustomizer.class)
 public class ResourceRef {
     /// The namespace of the referenced Kubernetes resource.
     /// If `null`, defaults to the namespace of the CR that defines this reference.