Calling `brew cask install` is disabled! Use brew install [--cask] instead.

[STA-WSYNC]

$ brew cask install WebPQuickLook

Error: Calling brew cask install is disabled! Use brew install [--cask] instead.

$ brew install --cask WebPQuickLook
==> Downloading https://raw.githubusercontent.com/emin/WebPQuickLook/master/WebpQuickLook.tar.gz
######################################################################## 100.0%
Warning: No checksum defined for cask 'webpquicklook', skipping verification.
==> Installing Cask webpquicklook
==> Moving QuickLook Plugin 'WebpQuickLook.qlgenerator' to '/Users/tomthornhill/Library/QuickLook/Web
🍺 webpquicklook was successfully installed!
(base)

Can you update the instructions from

If you use homebrew you can do:

brew cask install WebPQuickLook

to

If you use homebrew you can do:

brew install --cask WebPQuickLook