docs: add bitcoin donation option

README.md

@@ -40,8 +40,9 @@ Wiki.js is an open source project that has been made possible due to the generou
   [![Become a Sponsor](https://img.shields.io/badge/donate-github-ea4aaa.svg?style=popout&logo=github)](https://github.com/users/NGPixel/sponsorship)
   [![Become a Patron](https://img.shields.io/badge/donate-patreon-orange.svg?style=popout&logo=patreon)](https://www.patreon.com/requarks)
   [![Donate on OpenCollective](https://img.shields.io/badge/donate-open%20collective-blue.svg?style=popout&logo=data:image/svg+xml;base64,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)](https://opencollective.com/wikijs)
-  [![Donate via Paypal](https://img.shields.io/badge/donate-paypal-blue.svg?style=popout&logo=paypal)](https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=FLV5X255Z9CJU&source=url)
+  [![Donate via Paypal](https://img.shields.io/badge/donate-paypal-blue.svg?style=popout&logo=paypal)](https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=FLV5X255Z9CJU&source=url)  
   [![Donate via Ethereum](https://img.shields.io/badge/donate-ethereum-999.svg?style=popout&logo=ethereum&logoColor=CCC)](https://etherscan.io/address/0xe1d55c19ae86f6bcbfb17e7f06ace96bdbb22cb5)
+  [![Donate via Bitcoin](https://img.shields.io/badge/donate-bitcoin-ff9900.svg?style=popout&logo=bitcoin&logoColor=CCC)](https://checkout.opennode.com/p/2553c612-f863-4407-82b3-1a7685268747)
   [![Buy a T-Shirt](https://img.shields.io/badge/buy-t--shirts-teal.svg?style=popout&logo=data:image/svg+xml;base64,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)](https://wikijs.threadless.com)
 
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