Change spec

Author: Llorenç

docs/ii-spec.mdx

@@ -72,7 +72,7 @@ Just for background: At launch this meant we relied on the trustworthiness of th
 ## Identity design and data model
 
 
-The Internet Computer serves this frontend under hostnames `https://identity.internetcomputer.org` (official) and `https://identity.internetcomputer.org` (experimental).
+The Internet Computer serves this frontend under hostnames `https://identity.internetcomputer.org` (official) and `https://identity.ic0.app` (legacy).
 
 The canister maintains a salt (in the following the `salt`), a 32 byte long blob that is obtained via the Internet Computer's source of secure randomness.