Docs: Fix typo in table (#4582)

Author: dnbnero

docs/reference/configuration.md

@@ -243,7 +243,7 @@ For example, you might have a specific connection where your tests should run re
 | Option                    | Description                                                                                                                                            |    Type     | Required |
 | ------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------ | :---------: | :------: |
 | `default_connection`      | The default connection to use if one is not specified in a gateway (Default: A DuckDB connection that creates an in-memory database)                   | connection  |    N     |
-| `default_test_connection` | The default connection to use when running tests if one is not specified in a gateway (Default: A DuckDB connection that creates an in-memory database | connection) |    N     |
+| `default_test_connection` | The default connection to use when running tests if one is not specified in a gateway (Default: A DuckDB connection that creates an in-memory database) | connection |    N     |
 | `default_scheduler`       | The default scheduler configuration to use if one is not specified in a gateway (Default: built-in scheduler)                                          |  scheduler  |    N     |
 
 ## Debug mode