Bump org.springframework:spring-webmvc in /extension-spring

Bumps [org.springframework:spring-webmvc](https://github.com/spring-projects/spring-framework) from 5.3.39 to 6.1.13.
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](spring-projects/spring-framework@v5.3.39...v6.1.13)

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

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

extension-spring/pom.xml

@@ -13,7 +13,7 @@
     <name>SmallRye: OpenAPI extension - Spring </name>
 
     <properties>
-        <version.spring>5.3.39</version.spring>
+        <version.spring>6.1.13</version.spring>
     </properties>
 
     <dependencyManagement>