build(deps): bump io.freefair.lombok from 8.4 to 8.6

Bumps [io.freefair.lombok](https://github.com/freefair/gradle-plugins) from 8.4 to 8.6.
- [Release notes](https://github.com/freefair/gradle-plugins/releases)
- [Commits](freefair/gradle-plugins@8.4...8.6)

---
updated-dependencies:
- dependency-name: io.freefair.lombok
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

build.gradle

@@ -1,7 +1,7 @@
 plugins {
     id 'org.springframework.boot' version '3.2.2'
     id 'io.spring.dependency-management' version '1.1.4'
-    id 'io.freefair.lombok' version '8.4'
+    id 'io.freefair.lombok' version '8.6'
     id 'java'
     id 'io.github.itzg.simple-boot-image' version '3.2.1'
     // https://github.com/qoomon/gradle-git-versioning-plugin