source-repository-package type does not list supported version control types

[type: VCS kind](https://cabal.readthedocs.io/en/stable/cabal-project.html#cfg-field-type) does not list the supported version control types.

It would be useful to have a list of types like https://cabal.readthedocs.io/en/stable/cabal-package.html#pkg-field-source-repository-type has.