Upgrade to Spring Security 5.2.8.RELEASE

Closes gh-24366

Author: snicoll

spring-boot-project/spring-boot-dependencies/pom.xml

@@ -198,7 +198,7 @@
 		<spring-ldap.version>2.3.3.RELEASE</spring-ldap.version>
 		<spring-restdocs.version>2.0.5.RELEASE</spring-restdocs.version>
 		<spring-retry.version>1.2.5.RELEASE</spring-retry.version>
-		<spring-security.version>5.2.7.RELEASE</spring-security.version>
+		<spring-security.version>5.2.8.RELEASE</spring-security.version>
 		<spring-session-bom.version>Corn-SR4</spring-session-bom.version>
 		<spring-ws.version>3.0.10.RELEASE</spring-ws.version>
 		<sqlite-jdbc.version>3.28.0</sqlite-jdbc.version>