Add AMO links to experiments on Medium blog

[pdehaan]

https://medium.com/firefox-test-pilot/adios-amigo-51bec2a00072#bedc

(ed note: I’ll add links to these new URLs here once I have them early next week).

Not sure if there is a URL for Price Wise yet, seems like the TestPilot EOL page still points to https://github.com/mozilla/testpilot/wiki/Coming-Soon placeholder page.

[lmorchard]

Not sure if there is a URL for Price Wise yet

There isn't, and it might be awhile before we have one, thus the Coming Soon page

[marniepw]

Here's the Price Wise URL: https://addons.mozilla.org/en-US/firefox/addon/price-wise/