fix info about private relay

docs/os/ios-overview.md

@@ -41,7 +41,7 @@ You can also protect your data by limiting what you sync to iCloud in the first
 
 A paid **iCloud+** subscription (with any iCloud storage plan) comes with some privacy-protecting functionality. While these may provide adequate service for current iCloud customers, we wouldn't recommend purchasing an iCloud+ plan over a [VPN](../vpn.md) and [standalone email aliasing service](../email-aliasing.md) just for these features alone.
 
-**Private Relay** is a proxy service which relays your Safari traffic through two servers: one owned by Apple and one owned by a third-party provider (including Akamai, Cloudflare, and Fastly). In theory this should prevent any single provider in the chain—including Apple—from having full visibility into which websites you visit while connected. Unlike a full VPN, Private Relay does not protect traffic from your apps outside of Safari.
+[**Private Relay**](https://www.apple.com/legal/privacy/data/en/icloud-relay/) is a proxy service which relays your Safari traffic and all unencrypted traffic on your device as well as your DNS queries through two servers: one owned by Apple and one owned by a third-party provider (including Akamai, Cloudflare, and Fastly). In theory this should prevent any single provider in the chain—including Apple—from having full visibility into which websites you visit while connected. Unlike a full VPN, Private Relay does not protect traffic that's already encrypted.
 
 **Hide My Email** is Apple's email aliasing service. You can create an email aliases for free when you *Sign In With Apple* on a website or app, or generate unlimited aliases on demand with a paid iCloud+ plan. Hide My Email has the advantage of using the `@icloud.com` domain for its aliases, which may be less likely to be blocked compared to other email aliasing services, but does not offer functionality offered by standalone services such as automatic PGP encryption or multiple mailbox support.