changelog: Write `arg0` entry.
changelog: Write `arg0` entry.

joshuarubin/dotfiles,stuha/wbr-zsh,danielshahaf/zsh-syntax-highlighting-debian,zsh-users/zsh-syntax-highlighting,P71/zsh-syntax-highlighting,phy1729/zsh-syntax-highlighting,x-way/zsh-syntax-highlighting,joshuarubin/dotfiles,phy1729/zsh-syntax-highlighting,zsh-users/zsh-syntax-highlighting,P71/zsh-syntax-highlighting,joshuarubin/dotfiles,joshuarubin/dotfiles,x-way/zsh-syntax-highlighting,danielshahaf/zsh-syntax-highlighting-debian,danielshahaf/zsh-syntax-highlighting,danielshahaf/zsh-syntax-highlighting