Add netbsd/amd64 release binaries

[0-wiz-0]

What would you like to be added:
Please provide binary packages for NetBSD/amd64.

Why is this needed:
I tried building https://github.com/anchore/syft
Its Makefile's bootstrap target tries installing quill using the curl method, and this failed on my system with:

curl -sSfL https://raw.githubusercontent.com/anchore/quill/main/install.sh | sh -s -- -b ./.tmp/ v0.2.0
[info]\033[0m using release tag='v0.2.0' version='0.2.0' os='netbsd' arch='amd64' \033[0m
\033[0;31m\033[1m[error]\033[0m could not find release asset for os='netbsd' arch='amd64' format='tar.gz'  \033[0m
\033[0;31m\033[1m[error]\033[0m failed to install quill \033[0m

Additional context:

[0-wiz-0]

Thank you!