docs: Add resource link for NetBSD operating system
docs: Add resource link for NetBSD operating system

Signed-off-by: Hussaina Begum Nandyala <95909a9b07eeaf3eb3de462b9017f6437515a31d@gmail.com>

phy1729/zsh-syntax-highlighting,zsh-users/zsh-syntax-highlighting,P71/zsh-syntax-highlighting,phy1729/zsh-syntax-highlighting,zsh-users/zsh-syntax-highlighting,P71/zsh-syntax-highlighting