Bump io.freefair.lombok from 6.6.3 to 8.6 in /e2e-tests (#676)

Bumps [io.freefair.lombok](https://github.com/freefair/gradle-plugins) from 6.6.3 to 8.6.
- [Release notes](https://github.com/freefair/gradle-plugins/releases)
- [Commits](freefair/gradle-plugins@6.6.3...8.6)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

e2e-tests/build.gradle

@@ -1,6 +1,6 @@
 plugins {
     id 'java'
-    id "io.freefair.lombok" version "6.6.3"
+    id "io.freefair.lombok" version "8.6"
 }
 
 apply plugin: 'java'