Update cas-client-core to 3.6.4

Closes gh-10637

Author: marcusdacoregio

dependencies/spring-security-dependencies.gradle

@@ -54,7 +54,7 @@ dependencies {
 		api "org.eclipse.persistence:javax.persistence:2.2.1"
 		api "org.hibernate:hibernate-entitymanager:5.4.33"
 		api "org.hsqldb:hsqldb:2.6.1"
-		api "org.jasig.cas.client:cas-client-core:3.6.2"
+		api "org.jasig.cas.client:cas-client-core:3.6.4"
 		api "org.mockito:mockito-core:3.9.0"
 		api "org.openid4java:openid4java-nodeps:0.9.6"
 		api "org.opensaml:opensaml-core:$openSamlVersion"