Docs: Update _index.md (#26561)

* Update _index.md

* Update docs/sources/features/datasources/_index.md

Co-authored-by: Arve Knudsen <arve.knudsen@gmail.com>

Co-authored-by: Arve Knudsen <arve.knudsen@gmail.com>
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Diana Payton 2020-08-07 08:06:50 -07:00 committed by GitHub
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@ -41,6 +41,7 @@ In addition to the data sources that you have configured in your Grafana, there
- **Mixed -** Select this to query multiple data sources in the same panel. When this data source is selected, Grafana allows you to select a data source for every new query that you add.
* The first query will use the data source that was selected before you selected **Mixed**.
* You cannot change an existing query to use the Mixed Data Source.
* Grafana Play example: [Mixed data sources](https://play.grafana.org/d/000000100/mixed-datasources?orgId=1)
- **Dashboard -** Select this to use a result set from another panel in the same dashboard.
## Data source plugins