index.md: Fixed layout bugs

docs/documentation/sizing/tank_design/index.md

@@ -13,10 +13,12 @@ Blended-wing-body |...               |...        |...        |under development
 ## A user's guide to tank design
 The _tank\_design_ tool is your key to designing the aircraft's fuel storage. In this user documentation, you’ll find all the information you need to understand the tool, as well as the necessary inputs and configurations to run a tank design from the ground up.
 The following sections will walk you through the process:
+
 - [Getting started](getting_started.md)
 - [Run your first tank design](run_your_first_tank_design.md)
 
 For a comprehensive understanding of the tool’s functionality, the documentation is structured into two distinct sections:
+
 - A [method description](tank_design_method.md) and
 - a [software architecture](software_architecture.md)
 section.