Update org.eclipse.jetty to 9.4.40.v20210413

Closes gh-9713

Author: rwinch

dependencies/spring-security-dependencies.gradle

@@ -49,8 +49,8 @@ dependencies {
 		api "org.assertj:assertj-core:3.19.0"
 		api "org.bouncycastle:bcpkix-jdk15on:1.68"
 		api "org.bouncycastle:bcprov-jdk15on:1.68"
-		api "org.eclipse.jetty:jetty-server:9.4.39.v20210325"
-		api "org.eclipse.jetty:jetty-servlet:9.4.39.v20210325"
+		api "org.eclipse.jetty:jetty-server:9.4.40.v20210413"
+		api "org.eclipse.jetty:jetty-servlet:9.4.40.v20210413"
 		api "org.eclipse.persistence:javax.persistence:2.2.1"
 		api "org.hibernate:hibernate-entitymanager:5.4.30.Final"
 		api "org.hsqldb:hsqldb:2.6.0"