Add send SAS script to the user guide #18703

Follow-up to #18629
Summary of the issue:

#18629 added an (unassigned) script to send alt+ctrl+del via Remote Access, but this wasn't included in the list of Remote Access keyboard shortcuts.
Description of user facing changes:

This command is now listed in the list of Remote Access commands.
Description of developer facing changes:

None

Author: SaschaCowley

user_docs/en/userGuide.md

@@ -3858,6 +3858,7 @@ Once a Remote Access session is active, you can switch between controlling the r
 | Disconnect | None | Ends an existing Remote Access session. |
 | Mute remote | None | Mutes or unmutes the speech coming from the remote computer. |
 | Send clipboard | None | Sends the contents of the clipboard to the remote computer. |
+| Send `control+alt+delete` | None | Sends `control+alt+delete` to the controlled computer. |
 <!-- KC:endInclude -->
 
 ## Add-ons and the Add-on Store {#AddonsManager}