feat(dashboards): Add EA docs for Dashboard Filters (#5344)

Page filters and the new release filter on dashboard
can now be saved.

Co-authored-by: Isabel <[email protected]>

Co-authored-by: Isabel <[email protected]>

Author: shruthilayaj

src/docs/product/dashboards/custom-dashboards/index.mdx

@@ -37,6 +37,18 @@ Clicking "Create Dashboard" takes you to a new dashboard where you can immediate
 
 When the "Show Templates" toggle is enabled, several default dashboard templates are displayed. You can add each template directly to the list of dashboards by clicking "Add Dashboard", or preview it by clicking "Preview". You have to add a template before you can edit the resulting dashboard. You can also duplicate or delete a dashboard created from a template (this does not delete the template).
 
+### Dashboard Filters
+
+<Note>
+
+This feature is available only if you're in the Early Adopter program. Features available to Early Adopters are still in-progress and may have bugs. We recognize the irony.
+
+If you’re interested in being an Early Adopter, you can turn your organization’s Early Adopter status on/off in General Settings. This will affect all users in your organization and can be turned back off just as easily.
+
+</Note>
+
+Dashboard filters are applied to all the widgets in your dashboard. They consist of [page filters](/product/sentry-basics/search/#page-filters) that allow you to narrow down the widget results to certain projects, environments, and date ranges, and a release filter that restricts the data to certain releases. Changing a dashboard filter will prompt you to "Save" or "Cancel". To persist filter changes to your dashboard, click "Save", or click "Cancel" to discard the changes.
+
 ## Widget Builder
 
 When adding a widget or editing an existing one, you will be taken to a new page where you can see the dashboard widget builder. The widget builder has several configuration options that you can use to shape data and add information to your dashboard. Learn more in the [Widget Builder documentation](/product/dashboards/widget-builder/).