Merge pull request #1346 from willingc/add-diataxis-contrib

Add diataxis reference in contributing doc

Author: pradyunsg

source/contribute.rst

@@ -32,9 +32,12 @@ Documentation types
 ===================
 
 This project consists of four distinct documentation types with specific
-purposes. When proposing new additions to the project please pick the
+purposes. The project aspires to follow the `Diátaxis process`_
+for creating quality documentation. When proposing new additions to the project please pick the
 appropriate documentation type.
 
+.. _Diátaxis process: https://diataxis.fr/
+
 Tutorials
 ---------