Fix NB in the "Database containers" docs (#1484)

Author: izeye

docs/modules/databases/index.md

@@ -43,6 +43,7 @@ Examples/Tests:
 As long as you have Testcontainers and the appropriate JDBC driver on your classpath, you can simply modify regular JDBC connection URLs to get a fresh containerized instance of the database each time your application starts up.
 
 _N.B:_
+
 * _TC needs to be on your application's classpath at runtime for this to work_
 * _For Spring Boot you need to specify the driver manually `spring.datasource.driver-class-name=org.testcontainers.jdbc.ContainerDatabaseDriver`_