Add support for domain names

Author: maxvp

src/content/docs/cloudflare-one/policies/gateway/lists.mdx

@@ -16,7 +16,7 @@ Before creating a list, make note of the [limitations](#limitations).
 Lists can contain a single type of data each. Supported data types include:
 
 - URLs
-- Hostnames
+- Hostnames or domains
 - Serial numbers
 - User email addresses
 - IP addresses