Upgrade to Jetty El 8.5.24.2

Closes gh-12279

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

@@ -91,7 +91,7 @@
 		<jest.version>5.3.3</jest.version>
 		<jetty.version>9.4.8.v20171121</jetty.version>
 		<jetty-jsp.version>2.2.0.v201112011158</jetty-jsp.version>
-		<jetty-el.version>8.5.24.1</jetty-el.version>
+		<jetty-el.version>8.5.24.2</jetty-el.version>
 		<jmustache.version>1.14</jmustache.version>
 		<jna.version>4.5.1</jna.version>
 		<joda-time.version>2.9.9</joda-time.version>