Adjusted heading sizes.

README.md

@@ -10,19 +10,19 @@ VASSAL is a game engine for building and playing online adaptations of board gam
 
 ## Getting started
 
-# Minimum Requirements
+### Minimum Requirements
 
 VASSAL 3.3 requires Java 11 or later.
 
 The Windows and Mac packages have an appropriate version of Java bundled with
 them, so there is no need to install Java separately on those operating
 systems.
 
-# Releases
+### Releases
 
 Get the [current release](https://github.com/vassalengine/vassal/releases/latest).
 
-# Getting started
+### Installation
 
 * Linux
 ```shell
@@ -35,7 +35,7 @@ cd VASSAL-3.3.2
 
 ## Contributing
 
-# Bug reports
+#### Bug reports
 
 Please report bugs in the [Technical Support & Bugs](http://www.vassalengine.org/forum/viewforum.php?f=3) section of our forum.