Correct misleading 'setup-repository' command in docs

[vjf]

Overview

For first time users this error is very frustrating, 'setup_repository' does not work.

Error: No such command 'setup_repository'.

Related Issue / Discussion

Additional Information

Contributions and Licensing

(as per https://github.com/geopython/pycsw/blob/master/CONTRIBUTING.rst#contributions-and-licensing)

• I'd like to contribute [feature X|bugfix Y|docs|something else] to pycsw. I confirm that my contributions to pycsw will be compatible with the pycsw license guidelines at the time of contribution.
• I have already previously agreed to the pycsw Contributions and Licensing Guidelines