add note about dashboard type needed for data health tile

this pr adds a prereq and note that the exposure needs to be `dashboard` type in order to see the embed health tile drodown in explorer.

Resolves #6815

website/docs/docs/collaborate/data-tile.md

@@ -27,7 +27,8 @@ Data health tiles rely on [exposures](/docs/build/exposures) to surface data hea
 - You must have a dbt Cloud account on a [Team or Enterprise plan](https://www.getdbt.com/pricing/).
 - You must be an account admin to set up [service tokens](/docs/dbt-cloud-apis/service-tokens#permissions-for-service-account-tokens).
 - You must have [develop permissions](/docs/cloud/manage-access/seats-and-users).
-- Have [exposures](/docs/build/exposures) configured in your project and [source freshness](/docs/deploy/source-freshness) enabled in the job that generates this exposure.
+- Have [exposures](/docs/build/exposures) defined in your project and [source freshness](/docs/deploy/source-freshness) enabled in the job that generates this exposure.
+   - The exposure used for the  data health tile must have the [`type` property](/docs/build/exposures#available-properties) set to `dashboard`. Otherwise, you won't be able to view the **Embed data health tile in your dashboard** drop in dbt Explorer.
 
 ## View exposure in dbt Explorer