v4.2.0
[SPARK-49174][BUILD][DOCS] Exclude the dir `docs/util` from `_site`
[SPARK-56832][INFRA] Surface fatal javadoc errors in unidoc log summary and CI annotations
[MINOR][DOCS] Add license header at docs/_plugins
[MINOR] Fix some typos
[MINOR][DOCS] Remove unneeded production tag block method