change spring-webmvc version (duosecurity#41)

Author: DenitsaTH

duo-example/pom.xml

@@ -43,7 +43,7 @@
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-webmvc</artifactId>
-            <version>5.3.18</version>
+            <version>5.3.24</version>
         </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>