Bump lombok from 1.18.12 to 1.18.18 in /plugins/gradle/example-server (#507)

Bumps [lombok](https://github.com/rzwitserloot/lombok) from 1.18.12 to 1.18.18.
- [Release notes](https://github.com/rzwitserloot/lombok/releases)
- [Changelog](https://github.com/rzwitserloot/lombok/blob/master/doc/changelog.markdown)
- [Commits](https://github.com/rzwitserloot/lombok/compare/v1.18.12...v1.18.18)
Signed-off-by: Ndependabot[bot] <support@github.com>
Co-authored-by: Ndependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

plugins/gradle/example-server/build.gradle

@@ -24,7 +24,7 @@ dependencies {
     implementation "org.mapstruct:mapstruct:1.4.1.Final"
     annotationProcessor "org.mapstruct:mapstruct-processor:1.4.1.Final"
 
-    compileOnly "org.projectlombok:lombok:1.18.12"
+    compileOnly "org.projectlombok:lombok:1.18.18"
     annotationProcessor "org.projectlombok:lombok:1.18.12"
 }