Could you update the dashboard json file on Grafana Labs?

Hi,

Thanks for your great project. I am new to Grafana and Grafana Labs.

When I import the dashboard with id `11985`, the dashboard shows "NO DATA" and "N/A" without any configuration. It throws errors saying "Datasource ${DS_PROMETHEUS} was not found" and "Datasource ${DS_PROMETHEUS_HAT} was not found". After I configure the variable `DS_PROMETHEUS` and `DS_PROMETHEUS_HAT` as my Prometheus data source, it will work.

While I copy the json content from this repo to Grafana to create the dashboard, it will work well.

So I think there may be some problems in the version that was uploaded to Grafana Labs. Could you update the dashboard file on Grafana Labs?