README and provider config link to the test docs host #2

Summary

The README and the provider config both send people to a test docs host for the API reference:

https://test-docs.heycall-e.com/api-reference

README.md line 24, provider/call_e.yaml line 24.

It resolves right now, so nothing is visibly broken. That is sort of the problem. Production docs live at docs.heycall-e.com, and a shipped plugin quietly pointing at a test host is the kind of thing that works fine until the day the test host drifts, moves, or gets turned off, and then it fails for everyone using the plugin rather than for anybody who would notice.

The dashboard.heycall-e.com and api.heycall-e.com links in the same files are on production hosts, so this one looks like it was left behind rather than chosen.

Where

• README.md, line 24
• provider/call_e.yaml, line 24

Suggested fix

Point both at https://docs.heycall-e.com/api-reference.