[chore] make the istructions on fetching all commits clearer. (#7474)

* make the istructions on fetching all commits clearer.

* Update setup.py
Co-authored-by: YiYi Xu <yixu310@gmail.com>

---------
Co-authored-by: YiYi Xu <yixu310@gmail.com>

setup.py

@@ -72,7 +72,11 @@ To create the package for PyPI.
 9. Upload the final version to the actual PyPI:
    twine upload dist/* -r pypi
 
-10. Prepare the release notes and publish them on GitHub once everything is looking hunky-dory.
+10. Prepare the release notes and publish them on GitHub once everything is looking hunky-dory. You can use the following
+    Space to fetch all the commits applicable for the release: https://huggingface.co/spaces/lysandre/github-release. Repo should
+    be `huggingface/diffusers`. `tag` should be the previous release tag (v0.26.1, for example), and `branch` should be
+    the latest release branch (v0.27.0-release, for example). It denotes all commits that have happened on branch
+    v0.27.0-release after the tag v0.26.1 was created.
 
 11. Run `make post-release` (or, for a patch release, `make post-patch`). If you were on a branch for the release,
     you need to go back to main before executing this.