[macos] Fix `Flash` browser plugin install
[macos] Fix `Flash` browser plugin install

`flash` was renamed to `flash-npapi`.

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Ref: https://github.com/caskroom/homebrew-cask/pull/25447/files#diff-165a7b0c2a5741d5df8b493c9fe546b6L1

AlbertoElias/dotfiles,oddlord/dotfiles,pbrooks/dotfiles,christophermoura/dotfiles,b-boogaard/dotfiles,christophermoura/dotfiles,mickael83/ubuntu-dotfiles,mickael83/ubuntu-dotfiles,AlbertoElias/dotfiles,girishramnani/dotfiles,makabde/dotfiles,girishramnani/dotfiles,makabde/dotfiles