Add DESARROLLO-SLEP-ANTOFAGASTA to Chile - #1346

Thanks for the contribution! Below is a template that can make it easier when submitting your Organization:

Your Organization: Servicio Local de Educación Pública Antofagasta (SLEP Antofagasta)
GitHub Organization url: @DESARROLLO-SLEP-ANTOFAGASTA_
Country/Locality: Antofagasta, Chile

Inclusion requirements:

• [x ] Referenced account is an Organization not a User^
• [x ] If this is a government project, your Organization's description should include a reference to your country/agency.
• [x ] Make sure your Organization includes at least one public repository
• [x ] Please also include a URL for your organization that links back to your organization or agency homepage.

^ If you want to convert your account to an org, details can be found here: https://help.github.com/articles/converting-a-user-into-an-organization/

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