iPad docs: add copy & paste known issue

Author: bpmct

docs/ipad.md

@@ -111,11 +111,12 @@ and tricks helpful:
     - In general, expect to edit your keyboard shortcuts
   - There's no escape key by default on the Magic Keyboard, so most users set
     the globe key to be an escape key
-- Trackpad scrolling does not work on iPadOS < 145
+- Trackpad scrolling does not work on iPadOS < 14.5
   ([#1455](https://github.com/cdr/code-server/issues/1455))
   - [WebKit fix](https://bugs.webkit.org/show_bug.cgi?id=210071#c13)
 - Keyboard may lose focus in Safari / split view [#4182](https://github.com/cdr/code-server/issues/4182)
 - Terminal text does not appear by default [#3824](https://github.com/cdr/code-server/issues/3824)
+- Copy & paste in terminal does not work well with keyboard shortcuts [#3491](https://github.com/cdr/code-server/issues/3491)
 - `ctrl+c` does not stop a long-running process in the browser
   - Tracking upstream issue here:
     [#114009](https://github.com/microsoft/vscode/issues/114009)