New header structure

docs/index-header.md

@@ -8,10 +8,10 @@
 
 This page documents the work on the **Kekchí language model**. 
 
-# Project documentation
+## Project documentation
 
 * (Add links to project specific documentation here as needed. Keep the documentation in the `docs/` directory.)
 
-# In-source documentation
+## In-source documentation
 
 Below is an autogenerated list of documentation pages built from structured comments in the source code. All pages are also concatenated and can be read as one long text [here](kek.md).