Update plugin io.freefair.lombok to v8.12.1 (#210)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

build.gradle

@@ -3,7 +3,7 @@ plugins {
   id 'checkstyle'
   id 'jacoco'
   id 'java'
-  id "io.freefair.lombok" version "8.12"
+  id "io.freefair.lombok" version "8.12.1"
   id 'io.spring.dependency-management' version '1.1.7'
   id 'org.springframework.boot' version '2.7.18'
   id 'com.github.kt3k.coveralls' version '2.12.2'