ci: audit formula after installed it
ci: audit formula after installed it

There are post-install checks in `brew audit`.
So let's audit neovim after we installed it.

mattbailey/homebrew-neovim,fwalch/homebrew-neovim,rf-/homebrew-neovim,thyrgle/homebrew-neovim,jszakmeister/homebrew-neovim,timfeirg/homebrew-neovim