Bump org.mapstruct:mapstruct in /plugins/maven/example-client

Bumps [org.mapstruct:mapstruct](https://github.com/mapstruct/mapstruct) from 1.5.5.Final to 1.6.0.
- [Release notes](https://github.com/mapstruct/mapstruct/releases)
- [Changelog](https://github.com/mapstruct/mapstruct/blob/main/NEXT_RELEASE_CHANGELOG.md)
- [Commits](mapstruct/mapstruct@1.5.5.Final...1.6.0)

---
updated-dependencies:
- dependency-name: org.mapstruct:mapstruct
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

plugins/maven/example-client/pom.xml

@@ -169,7 +169,7 @@
         <dependency>
             <groupId>org.mapstruct</groupId>
             <artifactId>mapstruct</artifactId>
-            <version>1.5.5.Final</version>
+            <version>1.6.0</version>
         </dependency>
         <dependency>
             <groupId>org.projectlombok</groupId>