Shortly introduce these two topics in MASTG-KNOW-0083.md

This avoids information leakage leaving it up to the user. Since iOS 14/15.

Pasteboard transparency

iOS and iPadOS notify you when an app is copying content from the pasteboard so you’re aware of the activity. Developers can allow you to paste content from another app without having access to what you’ve copied until you want them to.

https://www.apple.com/privacy/control/

Secure Paste

With secure paste, developers can let users paste from a different app without having access to what was copied until the user takes action to paste it into their app. When developers use secure paste, users will be able to paste without being alerted via the pasteboard transparency notification, helping give them peace of mind.

https://www.apple.com/newsroom/2021/06/apple-advances-its-privacy-leadership-with-ios-15-ipados-15-macos-monterey-and-watchos-8