Update README and FUNDING

- Remove fosspay

.github/FUNDING.yml

 github: benz0li
 liberapay: benz0li
-custom: ['https://benz0li.b-data.io/donate/?project=1']

README.md

-[![minimal-readme compliant](https://img.shields.io/badge/readme%20style-minimal-brightgreen.svg)](https://github.com/RichardLitt/standard-readme/blob/master/example-readmes/minimal-readme.md) [![Project Status: Active – The project has reached a stable, usable state and is being actively developed.](https://www.repostatus.org/badges/latest/active.svg)](https://www.repostatus.org/#active) <a href="https://liberapay.com/benz0li/donate"><img src="https://liberapay.com/assets/widgets/donate.svg" alt="Donate using Liberapay" height="20"></a> <a href="https://benz0li.b-data.io/donate?project=1"><img src="https://benz0li.b-data.io/donate/static/donate-with-fosspay.png" alt="Donate with fosspay"></a>
+[![minimal-readme compliant](https://img.shields.io/badge/readme%20style-minimal-brightgreen.svg)](https://github.com/RichardLitt/standard-readme/blob/master/example-readmes/minimal-readme.md) [![Project Status: Active – The project has reached a stable, usable state and is being actively developed.](https://www.repostatus.org/badges/latest/active.svg)](https://www.repostatus.org/#active) <a href="https://liberapay.com/benz0li/donate"><img src="https://liberapay.com/assets/widgets/donate.svg" alt="Donate using Liberapay" height="20"></a>
 
 # JupyterLab R docker stack