Add GitHub sponsors button to feature paypal

[ghost]

Changes proposed in this request:

• Adds the GitHub sponsors button. Here's an example with playnite:
  
  https://github.com/JosefNemec/Playnite
  Info from GitHub on this below:

.github/FUNDING.yml shows the community how to support this project. Please see our repository funding links [documentation ](https://help.github.com/en/articles/displaying-a-sponsor-button-in-your-repository) for more information on formatting and what is and isn't allowed in this file.

Please note that funding links are currently disabled on this repository. Visit repository settings to enable display of your funding links.

[HighwayofLife]

Thank you for making this change!!