docs: Reference Rollup Designer on workspace.mdx

docs/pages/product/workspace.mdx

@@ -14,7 +14,8 @@ and are only available in Cube Cloud.
 
 In Cube Cloud, you can:
 * Use the [data model editor][ref-data-model] with the [development
-mode][ref-dev-mode] to build the data model of your semantic layer.
+mode][ref-dev-mode] and [Rollup Designer][ref-rollup-designer] to build
+the data model of your semantic layer.
 * Use [SQL Runner][ref-sql-runner] to inform the development of the data
 model.
 * Use [Playground][ref-playground] to run queries and test the data model.
@@ -42,6 +43,7 @@ With Cube Core, you can:
 
 [ref-infrastructure]: /product/deployment/cloud
 [ref-data-model]: /product/workspace/data-model
+[ref-rollup-designer]: /product/workspace/rollup-designer
 [ref-dev-mode]: /product/workspace/dev-mode
 [ref-sql-runner]: /product/workspace/sql-runner
 [ref-playground]: /product/workspace/playground
@@ -53,4 +55,4 @@ With Cube Core, you can:
 [ref-sso]: /product/workspace/sso
 [ref-budgets]: /product/workspace/budgets
 [ref-prefs]: /product/workspace/preferences
-[ref-cli]: /product/workspace/cli
+[ref-cli]: /product/workspace/cli