Update Mocha link
Update Mocha link

RK: noting obvious fix from [mortonfox](https://github.com/mortonfox)

Signed-off-by: Robb Kidd <11cd4f9ba93acb67080ee4dad8d03929f9e64bf2@chef.io>

robbkidd/supermarket,robbkidd/supermarket,chef/supermarket,robbkidd/supermarket,chef/supermarket,chef/supermarket,chef/supermarket,chef/supermarket,robbkidd/supermarket