Check/update MobaXterm setup instructions

[jen-reeve]

https://docs.nesi.org.nz/Getting_Started/Accessing_the_HPCs/MobaXterm_Setup_Windows/

[CallumWalley]

@AnthonyDShaw

[jen-reeve]

Add note that you need to ctrl+click on authentication (highlight and copy seems to hit enter prematurely) and probably a thing saying try using WSL or VSCode b/c they are better