Update developing.md.

Author: adamghill

DEVELOPING.md

@@ -22,11 +22,11 @@
 1. `poe t`
 1. `poe b`
 1. `poetry version major|minor|patch`
+1. Update django-unicorn.com's changelog.md
 1. Commit/tag/push version bump
 1. `poetry publish --build -r test`
 1. Make sure test package can be installed as expected (https://test.pypi.org/project/django-unicorn/)
 1. `poetry publish`
 1. Make sure live package can be installed as expected (https://pypi.org/project/django-unicorn/)
 1. [Create GitHub release](https://github.com/adamghill/django-unicorn/releases/new) and add changelog there
-1. Update django-unicorn.com's changelog.md
 1. Update django-unicorn.com's version of `django-unicorn`