fix broken numfocus link

README.md

@@ -7,7 +7,7 @@
 [![Devel Mailing List](https://img.shields.io/badge/Devel-List-lightgrey.svg)](https://mail.python.org/archives/list/[email protected]//)
 [![Data Hub](https://img.shields.io/badge/data-hub-orange.svg)](https://hub.yt/)
 [![Powered by NumFOCUS](https://img.shields.io/badge/powered%20by-NumFOCUS-orange.svg?style=flat&colorA=E1523D&colorB=007D8A)](http://numfocus.org)
-[![Sponsor our Project](https://img.shields.io/badge/donate-to%20yt-blueviolet)](https://numfocus.salsalabs.org/donate-to-yt/index.html)
+[![Sponsor our Project](https://img.shields.io/badge/donate-to%20yt-blueviolet)](https://numfocus.org/donate-to-yt)
 
 <!--- Tests and style --->
 [![Build and Test](https://github.com/yt-project/yt/actions/workflows/build-test.yaml/badge.svg)](https://github.com/yt-project/yt/actions/workflows/build-test.yaml)