zulu15: various updates (#12227)
zulu15: various updates (#12227)

* Update zulu15.rb

* Update zulu15.rb

* Update zulu15.rb

* Update zulu15.rb

* update livecheck

* update livecheck

Co-authored-by: Bevan Kay <a88b7dcd1a9e3e17770bbaa6d7515b31a2d7e85d@bevankay.me>
mahori/homebrew-cask-versions,404NetworkError/homebrew-versions,404NetworkError/homebrew-versions