Remove early link to gitwash and place description in the see also

It's super easy to click on that link and then get bogged down in details rather than read the short guide that follows that paragraph.

Author: ianhi

doc/devel/contributing.rst

@@ -101,9 +101,6 @@ The preferred way to contribute to Matplotlib is to fork the `main
 repository <https://github.com/matplotlib/matplotlib/>`__ on GitHub,
 then submit a "pull request" (PR).
 
-The best practices for using GitHub to make PRs to Matplotlib are
-documented in the :ref:`development-workflow` section.
-
 A brief overview is:
 
 1. `Create an account <https://github.com/join>`_ on GitHub if you do not
@@ -144,7 +141,7 @@ Finally, go to the web page of your fork of the Matplotlib repo, and click
   * `Git documentation <https://git-scm.com/documentation>`_
   * `Git-Contributing to a Project <https://git-scm.com/book/en/v2/GitHub-Contributing-to-a-Project>`_
   * `Introduction to GitHub  <https://lab.github.com/githubtraining/introduction-to-github>`_
-  * :ref:`development-workflow`
+  * :ref:`development-workflow` for best practices for Matplotlib
   * :ref:`using-git`
 
 Contributing pull requests