Update org.eclipse.jetty to 11.0.15

Closes gh-13049

Author: rwinch

dependencies/spring-security-dependencies.gradle

@@ -51,8 +51,8 @@ dependencies {
 		api "org.assertj:assertj-core:3.24.2"
 		api "org.bouncycastle:bcpkix-jdk15on:1.70"
 		api "org.bouncycastle:bcprov-jdk15on:1.70"
-		api "org.eclipse.jetty:jetty-server:11.0.14"
-		api "org.eclipse.jetty:jetty-servlet:11.0.14"
+		api "org.eclipse.jetty:jetty-server:11.0.15"
+		api "org.eclipse.jetty:jetty-servlet:11.0.15"
 		api "jakarta.persistence:jakarta.persistence-api:3.1.0"
 		api "org.hamcrest:hamcrest:2.2"
 		api "org.hibernate.orm:hibernate-core:6.1.7.Final"