Update plugin io.freefair.lombok to v6.6 (#798)

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

Author: renovate[bot]

build.gradle

@@ -26,7 +26,7 @@ buildscript {
         // https://github.com/alibaba/spring-cloud-alibaba/releases
         springCloudAlibabaNacosVersion = '2021.1'
 
-        lombokPluginVersion = '6.5.1'
+        lombokPluginVersion = '6.6'
         versioningPluginVersion = '2.15.1'
         versionsPluginVersion = '0.44.0'