brew warns that the appcast stanza is deprecated

[RockRockWhite]

Warning: Calling the `appcast` stanza is deprecated! Use the `livecheck` stanza instead.
Please report this issue to the bigwig-club/brew tap (not Homebrew/brew or Homebrew/homebrew-core), or even better, submit a PR to fix it:
  /opt/homebrew/Library/Taps/bigwig-club/homebrew-brew/Casks/upic.rb:9

How can I eliminate the warning? Does it means that you should update the rb file?

[RockRockWhite]

solved.