* Document customQueryParameters for prometheus datasource provisioning
The customQueryParameters option was added to prometheus datasources in https://github.com/grafana/grafana/pull/19121. This PR updates the "provisioning" documentation to contain a reference to this in the `jsonData` options for a prometheus datasource.
* Update docs/sources/administration/provisioning.md
Co-authored-by: achatterjee-grafana <70489351+achatterjee-grafana@users.noreply.github.com>
Co-authored-by: achatterjee-grafana <70489351+achatterjee-grafana@users.noreply.github.com>