Update custom-databases.md (#5788)

Adding Databricks UC to the callout for naming conventions of databases

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I'm adding a callout for "Catalogs" for Databricks Unity Catalog. 

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Co-authored-by: Ly Nguyen <[email protected]>

website/docs/docs/build/custom-databases.md

@@ -6,7 +6,7 @@ id: "custom-databases"
 
 :::info A word on naming
 
-Different warehouses have different names for "logical databases". The information in this document covers "databases" on Snowflake, Redshift, and Postgres, as well as "projects" on BigQuery.
+Different warehouses have different names for _logical databases_. The information in this document covers "databases" on Snowflake, Redshift, and Postgres; "projects" on BigQuery; and "catalogs" on Databricks Unity Catalog.
 
 The values `project` and `database` are interchangeable in BigQuery project configurations.