docs: Default refresh key for Firebolt

Author: igorlukanin

docs/pages/product/caching.mdx

@@ -193,9 +193,9 @@ recommend always enabling background refresh.
 
 ### Default Refresh Keys
 
-The default values for `refresh_key` are
+The default values for `refresh_key` are:
 
-- `every: 2 minute` for Databricks, BigQuery, Athena, Snowflake, and Presto.
+- `every: 2 minute` for Athena, BigQuery, Databricks, Firebolt, Presto, and Snowflake.
 - `every: 10 second` for all other databases.
 
 You can use a custom SQL query to check if a refresh is required by changing the