Fix definition of controlling and controlled computers being swapped (#18038)
Summary of the issue:
In the user guide section for the Remote Access automatic connection mode, the definitions for "Control another computer" and "Allow this computer to be controlled" were swapped.
Description of user facing changes
The definitions have been swapped, so they are now correctly paired.
"machine" has been replaced with "computer" per Fix up user-facing Remote Access terminology #17943.
Description of development approach
Modify the table in user_docs/en/userGuide.md.