Add a link to the Terms and Conditions from the main page

[RachelMuston]

Hi @markwooff would you be able to add a link to the Terms and Conditions file to the "Work with us/Travailler avec nous" section of the main page?

It would be great for it to be the first bullet. Thanks! :)

https://github.com/canada-ca/devex/blob/master/GCDevEx_TermsandConditions.md