Change tracking URL from Colissimo to 17 Track

[CryptoCoin]

Hello,

After my test order, I realised that on the email confirmation where it announces that the order has been shipped, when  I click on "track my order" next to my order number, it automaticly redirect me to "www.colissimo.fr" to track my order (because it delivers in France).

I'd like to change that URL to 17track.com in order to have more accurate information about the parcel.

Is there a way to do that in the settings or maybe in the code ? 

Thank you in advance for your answers