Add documentation for the PowerBIDatasetRefresh Operator.

[ambika-garg]

This PR intends to add the documentation like Connection types, Operators for the Power BI Dataset Refresh Operator in Apache Airflow Site. Refer to: https://airflow.apache.org/docs/apache-airflow-providers-microsoft-azure/10.5.0/_api/airflow/providers/microsoft/azure/operators/powerbi/index.html

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[potiuk]

static checks failing - there is some inconistency in the provider.yaml

[ambika-garg]

I've resolved the static checks. Could you please review it.

[Lee-W]

I think we'll need to resolve conflict again due to newly merged PR