Merge branch 'patch-1' into 'master'

add nixnet.xyz

See merge request librehosters/directory!2

directory.json

@@ -6,6 +6,7 @@
 "Indie.Host" : "https://indie.host/librehost.json",
 "lain haus" : "https://lain.haus/librehost.json",
 "LibreOps" : "https://libreops.cc/librehost.json",
+"NixNet" : "https://nixnet.xyz/librehost.json",
 "Petites Singularités" : "https://ps.lesoiseaux.io/librehost.json",
 "snopyta.org" : "https://snopyta.org/librehost.json",
 "Webarchitects Cooperative" : "https://www.webarchitects.coop/librehost-api/librehost.json",