fix(preparation): Add conditions to allow binary installation of version newer than 2.6.1

[TH3VenGeuR]

Summary : Add a when statement and a map to allow installation of version of ntfy newer than 2.6.1
Changes in tarball/zip naming:
Due to a change in GoReleaser, some of the binary release
archives now have slightly different names. My apologies if this causes issues in the downstream projects that use ntfy:

ntfy_v${VERSION}_windows_x86_64.zip -> ntfy_v${VERSION}_windows_amd64.zip
ntfy_v${VERSION}_linux_x86_64.tar.gz -> ntfy_v${VERSION}_linux_amd64.tar.gz
ntfy_v${VERSION}_macOS_all.tar.gz -> ntfy_v${VERSION}_darwin_all.tar.gz

[stevenengland]

Thanks for submitting. I will have a closer look soon