homebrew 홈페이지에서 링크 터미널에 입력하고 설치

brew tap adoptopenjdk/openjdk 여기까진 문제없었는데

brew search jdk 입력하니까 

Warning: Calling the `appcast` stanza is deprecated! Use the `livecheck` stanza instead.

Please report this issue to the adoptopenjdk/openjdk tap (not Homebrew/brew or Homebrew/homebrew-core), or even better, submit a PR to fix it:

  /opt/homebrew/Library/Taps/adoptopenjdk/homebrew-openjdk/Casks/adoptopenjdk9.rb:7

이런 warning이 엄청 많이 뜨는데 어떻게 해야되나요?