Upgrade to Spring Security 5.3.9.

Fixes #2021.

Author: odrotbohm

spring-data-rest-tests/spring-data-rest-tests-security/pom.xml

@@ -14,7 +14,7 @@
 
 	<properties>
 		<java-module-name>spring.data.rest.tests.security</java-module-name>
-		<spring-security.version>5.3.3.RELEASE</spring-security.version>
+		<spring-security.version>5.3.9.RELEASE</spring-security.version>
 	</properties>
 
 	<dependencies>