update: Privacy Notes section of iOS Overview

Signed-off-by: redoomed1 <[email protected]>

docs/os/ios-overview.md

@@ -21,9 +21,15 @@ The only source for apps on iOS is Apple's App Store, which requires an Apple Ac
 
 ### Invasive Telemetry
 
-Apple has historically had problems with properly anonymizing their telemetry on iOS. [In 2019](https://theguardian.com/technology/2019/jul/26/apple-contractors-regularly-hear-confidential-details-on-siri-recordings), Apple was found to transmit Siri recordings—some containing highly confidential information—to their servers for manual review by third-party contractors. While they temporarily stopped that program after that practice was [widely reported on](https://theverge.com/2019/8/23/20830120/apple-contractors-siri-recordings-listening-1000-a-day-globetech-microsoft-cortana), the problem wasn't completely resolved [until 2021](https://theguardian.com/technology/2021/jun/07/apple-overhauls-siri-to-address-privacy-concerns-and-improve-performance).
+Apple has historically had problems with properly disassociating their telemetry from Apple Accounts on iOS. [In 2019](https://theguardian.com/technology/2019/jul/26/apple-contractors-regularly-hear-confidential-details-on-siri-recordings), Apple was found to transmit Siri recordings—some containing highly confidential information—to their servers for manual review by third-party contractors. Though Apple temporarily stopped that program after that practice was [widely reported on](https://theverge.com/2019/8/23/20830120/apple-contractors-siri-recordings-listening-1000-a-day-globetech-microsoft-cortana), the company rolled out a switch to [**opt out** of uploading conversations with Siri](https://www.theguardian.com/technology/2019/oct/30/apple-lets-users-opt-out-of-having-siri-conversations-recorded) a few months later in the succeeding iOS update. Moreover, in 2021, Apple reworked Siri so that it processes voice recordings [locally](https://theguardian.com/technology/2021/jun/07/apple-overhauls-siri-to-address-privacy-concerns-and-improve-performance) rather than sending it to their servers.
 
-More recently, Apple has been found to [transmit analytics even when analytics sharing is disabled](https://gizmodo.com/apple-iphone-analytics-tracking-even-when-off-app-store-1849757558) on iOS, and this data [appears](https://twitter.com/mysk_co/status/1594515229915979776) to be easily linked to unique iCloud account identifiers despite supposedly being anonymous.
+More recently, Apple has been found to [transmit analytics even when analytics sharing is disabled](https://gizmodo.com/apple-iphone-analytics-tracking-even-when-off-app-store-1849757558) on iOS, and this data [appears](https://twitter.com/mysk_co/status/1594515229915979776) to be easily linked to unique iCloud account identifiers despite supposedly being decoupled from Apple Accounts.
+
+### Traffic Outside VPN
+
+According to Apple's [privacy policy regarding VPNs](https://www.apple.com/legal/privacy/data/en/vpns),
+
+> some traffic that is necessary for essential system services will take place outside the VPN so that your device can function properly.
 
 ## Recommended Configuration