Update website/docs/reference/resource-properties/constraints.md

Co-authored-by: Mirna Wong <[email protected]>

website/docs/reference/resource-properties/constraints.md

@@ -86,7 +86,7 @@ The structure of a constraint is:
 - `name` (optional): Human-friendly name for this constraint. Supported by some data platforms.
 - `columns` (model-level only): List of column names to apply the constraint over
 
-Today, in [dbt Cloud Versionless](/docs/dbt-versions/upgrade-dbt-version-in-cloud#versionless), you can use the new recommended syntax for defining foreign keys. This syntax leverages `ref`.
+In [dbt Cloud Versionless](/docs/dbt-versions/upgrade-dbt-version-in-cloud#versionless), you can use the improved syntax to define foreign keys, which uses `ref`. This feature will be available in the upcoming 1.9 release. The recommended syntax means:
 
 ### What's better about this syntax?