Fixed headings.

Author: ArtifactForms

documentation/assets.md

@@ -1,6 +1,6 @@
 # Asset Creators
 
-### ArchCreator
+## ArchCreator
 
 <img src="images/arch_creator.png" alt="ArchCreator" width="960"/>
 
@@ -22,7 +22,7 @@ mesh = creator.create();
 
 <img src="images/arch_creator_2.png" alt="Arch Creator" width="960"/>
 
-### ArchDoorCreator
+## ArchDoorCreator
 
 <img src="images/arch_door_creator.png" alt="ArchDoorCreator" width="960"/>
 
@@ -38,7 +38,7 @@ creator.setSegments(10);
 mesh = creator.create();
 ```
 
-### FlangedPipeCreator
+## FlangedPipeCreator
 
 <img src="images/flanged_pipe_creator_2.png" alt="FlangedPipeCreator" width="960"/>