Separate adapter-specific caveats for unit tests (#6606)

website/docs/docs/build/unit-tests.md

@@ -24,12 +24,14 @@ Starting in dbt Core v1.8, we have introduced an additional type of test to dbt
 - We currently only support adding unit tests to models in your _current_ project.
 - We currently _don't_ support unit testing models that use the [`materialized view`](/docs/build/materializations#materialized-view) materialization.
 - We currently _don't_ support unit testing models that use recursive SQL.
-- You must specify all fields in a BigQuery STRUCT in a unit test. You cannot use only a subset of fields in a STRUCT.
 - If your model has multiple versions, by default the unit test will run on *all* versions of your model. Read [unit testing versioned models](/reference/resource-properties/unit-testing-versions) for more information.
 - Unit tests must be defined in a YML file in your `models/` directory.
 - Table names must be [aliased](/docs/build/custom-aliases) in order to unit test `join` logic.
 - Include all [`ref`](/reference/dbt-jinja-functions/ref) or [`source`](/reference/dbt-jinja-functions/source) model references in the unit test configuration as `input`s to avoid "node not found" errors during compilation.
-- Redshift customers need to be aware of a [limitation when building unit tests](/reference/resource-configs/redshift-configs#unit-test-limitations) that requires a workaround. 
+
+#### Adapter-specific caveats
+- You must specify all fields in a BigQuery `STRUCT` in a unit test. You cannot use only a subset of fields in a `STRUCT`.
+- Redshift customers need to be aware of a [limitation when building unit tests](/reference/resource-configs/redshift-configs#unit-test-limitations) that requires a workaround.
 
 Read the [reference doc](/reference/resource-properties/unit-tests) for more details about formatting your unit tests.