Bump spring-webmvc in /src/it/projects/MJAVADOC-434_fixcompile

Bumps [spring-webmvc](https://github.com/spring-projects/spring-framework) from 4.3.29.RELEASE to 5.2.21.RELEASE.
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](spring-projects/spring-framework@v4.3.29.RELEASE...v5.2.21.RELEASE)

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

Signed-off-by: dependabot[bot] <support@github.com>

src/it/projects/MJAVADOC-434_fixcompile/pom.xml

@@ -59,7 +59,7 @@
     <dependency>
       <groupId>org.springframework</groupId>
       <artifactId>spring-webmvc</artifactId>
-      <version>4.3.29.RELEASE</version>
+      <version>5.2.21.RELEASE</version>
     </dependency>
     <dependency>
       <groupId>org.slf4j</groupId>