Link to codegen.go in mdatagen README does not exist anymore

[dgoscn]

Hello guys. I was using the document for Metadata Generator, but, the link that points to the codegen.go from example, doesn't exists anymore.

Someone knows if there are another path to resolve the same problem?

The link that not work is:

https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/receiver/hostmetricsreceiver/internal/scraper/cpuscraper/codegen.go

That is descripted here:
https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/cmd/mdatagen#build

Thank you

[jpkrohling]

Hi @dgoscn, I think we talked via Slack about it. Would you be able to send a PR to fix it?

[dgoscn]

Sure @jpkrohling

[dgoscn]

@jpkrohling I've opened this PR containing some fresh info
#16770