DOC: PyPI page points to dead link for release notes

[Michael-Gunther-KPM]

Describe the issue linked to the documentation

PyPI page release notes link points to:

• https://zarr.readthedocs.io/en/stable/release-notes
  instead of
• https://zarr.readthedocs.io/en/stable/release-notes.html

Suggested fix for documentation

Add .html to end of Changelog link in PyPI

[dstansby]

Thanks for reporting - this is a duplicate of #3073

[Michael-Gunther-KPM]

You're the best!