[3.2.x] Refs #32412 -- Adjusted link from tutorial to reference docs.
[3.2.x] Refs #32412 -- Adjusted link from tutorial to reference docs.

The writing code index page is a better location for a newer contributor to
land, than the specific patch guidelines subpage.

Backport of aa29c57beea7e8e570f8a597ea806ca3e2b3431d from master

koordinates/django,koordinates/django,koordinates/django,wkschwartz/django,wkschwartz/django,wkschwartz/django,wkschwartz/django,koordinates/django