[Doc] marked databricks_sql_dashboard as legacy (databricks#3836)

## Changes
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## Tests
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- [x] relevant change in `docs/` folder

docs/resources/sql_dashboard.md

@@ -3,9 +3,12 @@ subcategory: "Databricks SQL"
 ---
 # databricks_sql_dashboard Resource
 
-This resource is used to manage [Databricks SQL Dashboards](https://docs.databricks.com/sql/user/dashboards/index.html). To manage [SQLA resources](https://docs.databricks.com/sql/get-started/concepts.html) you must have `databricks_sql_access` on your [databricks_group](group.md#databricks_sql_access) or [databricks_user](user.md#databricks_sql_access).
+-> **Note:** Please switch to [databricks_dashboard](dashboard.md) to author new AI/BI dashboards using the latest tooling
 
-**Note:** documentation for this resource is a work in progress.
+This resource is used to manage [Legacy dashboards](https://docs.databricks.com/sql/user/dashboards/index.html). To manage [SQL resources](https://docs.databricks.com/sql/get-started/concepts.html) you must have `databricks_sql_access` on your [databricks_group](group.md#databricks_sql_access) or [databricks_user](user.md#databricks_sql_access).
+
+
+-> **Note:** documentation for this resource is a work in progress.
 
 A dashboard may have one or more [widgets](sql_widget.md).
 

docs/resources/sql_widget.md

@@ -3,11 +3,13 @@ subcategory: "Databricks SQL"
 ---
 # databricks_sql_widget Resource
 
-To manage [SQLA resources](https://docs.databricks.com/sql/get-started/concepts.html) you must have `databricks_sql_access` on your [databricks_group](group.md#databricks_sql_access) or [databricks_user](user.md#databricks_sql_access).
+-> **Note:** Please switch to [databricks_dashboard](dashboard.md) to author new AI/BI dashboards using the latest tooling
 
-**Note:** documentation for this resource is a work in progress.
+To manage [SQL resources](https://docs.databricks.com/sql/get-started/concepts.html) you must have `databricks_sql_access` on your [databricks_group](group.md#databricks_sql_access) or [databricks_user](user.md#databricks_sql_access).
 
-A widget is always tied to a [dashboard](sql_dashboard.md). Every dashboard may have one or more widgets.
+-> **Note:** documentation for this resource is a work in progress.
+
+A widget is always tied to a [Legacy dashboard](sql_dashboard.md). Every dashboard may have one or more widgets.
 
 ## Example Usage