This commit:
* Restructures the doc to use a numbered-step format.
Note that there are no screenshots. I signed up for a
Fabric/Crashlyics account but you have to link an Android/iOS app
to even get to the settings panel, which seemed like too much work
just to get a screenshot.
However, the way we can verify (somewhat) the correctness of the
last step is that it is a paraphrase of the first paragraph of
Fabric's Webhook docs, which can be found here:
https://docs.fabric.io/apple/crashlytics/custom-web-hooks.html
Eeshan Garg