[CAL-2943] Update deprecated property from Vital in the App Store

[zomars]

Got this email from the Vital team:

This is the final reminder that the field `source` is supersede by `provider` throughout our API and Webhooks payloads.

We will remove the former by the end of this week.

Link to the docs https://docs.tryvital.io/wearables/providers/resources#sleep-stream

_{From SyncLinear.com | CAL-2943}

[shekharkalshetti]

can i work on this?

[keithwillcode]

@shekharkalshetti sure thing. We’ll have a look if you open a PR!