Update dropbox-beta from 71.3.105 to 72.3.124 (#7278)
Update dropbox-beta from 71.3.105 to 72.3.124 (#7278)


lantrix/homebrew-versions,lantrix/homebrew-versions,rogeriopradoj/homebrew-versions,victorpopkov/homebrew-versions,rogeriopradoj/homebrew-versions,Ngrd/homebrew-versions,victorpopkov/homebrew-versions,404NetworkError/homebrew-versions,404NetworkError/homebrew-versions,Ngrd/homebrew-versions,mahori/homebrew-cask-versions,pkq/homebrew-versions,caskroom/homebrew-versions,caskroom/homebrew-versions,pkq/homebrew-versions