repo entry should use https:// by default

[shinaoka]

By default, the repo entry is set to something like

repo = "git@github.com:tensor4all/ProjMPSs.jl.git

It is better to use https://github.com/tensor4all/ProjMPSs.jl.git

[terasakisatoshi]

🫡

[terasakisatoshi]

This repository T4ARegistrator.jl is a public and ProjMPSs.jl is also public repository(but not registered in Julia's General registry). Therefore

It is better to use
https://github.com/tensor4all/ProjMPSs.jl.git

it's reasonable to me.

If we would like to register a private package in this T4ARegistrator.jl, We consider that some caution is required e.g., using git@github.com:tensor4all/<PrivateRepository>