Update directory.json with Chilemasto.casa

Thanks for applying to join librehosters!

Please share a link to:

• the git repositories of your infrastructure (or detail a bit what you are using): I use vainilla Mastodon, Mumble, Trunk, Plume and Friendica. Source Code I use is linked on the homepage.
• the thread of your introduction on the forum: https://talk.libreho.st/t/introductions-thread/29/42

Thank you.

directory.json

 {
 "aktivix.org" : "https://aktivix.org/librehost.json",
+"Chilemasto.casa" : "https://home.chilemasto.casa/librehost.json"
 "Cloud68.co" : "https://cloud68.co/librehost.json",
 "Dark Peak Data Co-operative" : "http://librehosters-api.darkpeak.org/librehost.json",
 "Disroot.org" : "https://disroot.org/librehost/librehost.json",