[docs] Add status header for prometheus exporter (#10329)
[docs] Add status header for prometheus exporter (#10329)

* Add status header for prometheus

* Apply suggestions from code review

Co-authored-by: Alex Boten <1e5a92690ae5061b029620512ac8ae33d4f3a3b3@lightstep.com>
open-telemetry/opentelemetry-collector-contrib,open-telemetry/opentelemetry-collector-contrib