fix: Calling `brew cask search` is deprecated

In most recent homebrew, calling `brew cask search` is deprecated.
Use `brew search` instead.
See pull-request #4316 (https://github.com/Homebrew/brew/pull/4316) for details.

modules/homebrew/init.zsh

@@ -31,5 +31,5 @@ alias caskC='brew cask cleanup'
 alias caski='brew cask install'
 alias caskl='brew cask list'
 alias casko='brew cask outdated'
-alias casks='brew cask search'
+alias casks='brew search'
 alias caskx='brew cask uninstall'