Bump spring-webmvc in /spring-mvc-root-webapplicationcontext

Bumps [spring-webmvc](https://github.com/spring-projects/spring-framework) from 4.0.0.RELEASE to 5.2.20.RELEASE.
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](spring-projects/spring-framework@v4.0.0.RELEASE...v5.2.20.RELEASE)

---
updated-dependencies:
- dependency-name: org.springframework:spring-webmvc
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

spring-mvc-root-webapplicationcontext/pom.xml

@@ -11,7 +11,7 @@
   <url>http://maven.apache.org</url>
 
 	<properties>
-		<spring.version>4.0.0.RELEASE</spring.version>
+		<spring.version>5.2.20.RELEASE</spring.version>
 		<junit.version>4.11</junit.version>
 	</properties>