README for spanmetricsconnector is missing output examples

[howardyoo]

Component(s)

connector/spanmetrics

What happened?

Description

In the README, https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/connector/spanmetricsconnector/README.md ,the documentation does not specify details regarding what the metrics data that connector will product would look like. The description of what to expect is vague and unspecified.

Solution

Add example of what the output of metrics would look like when span data are converted into metrics.

Collector version

N/A

Environment information

No specific environment

OpenTelemetry Collector configuration

No response

Log output

No response

Additional context

No response

[github-actions]

Pinging code owners:

• connector/spanmetrics: @portertech @Frapschen

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