Adding procaptcha

Author: crazymetakow

README.md

@@ -390,6 +390,7 @@ _Sketch input using Canvas or SVG_
 ### Miscellaneous
 
 - [puck](https://github.com/measuredco/puck) - [demo](https://puck-editor-demo.vercel.app/edit) - The self-hosted visual editor for React
+- [procaptcha](https://github.com/prosopo/captcha) - [demo](https://prosopo.io/) - [docs](https://docs.prosopo.io/) - Privacy focused free CAPTCHA
 - [react-advanced-news-ticker](https://github.com/ahmetcanaydemir/react-advanced-news-ticker) - [demo](https://www.ahmetcanaydemir.com/react-advanced-news-ticker/) - A flexible and animated vertical news ticker component
 - [react-avatar-generator](https://github.com/JosephSmith127/react-avatar-generator) - Allows users to create random kaleidoscopes to be used as avatars.
 - [react-awesome-query-builder](https://github.com/ukrbublik/react-awesome-query-builder) - [demo](https://ukrbublik.github.io/react-awesome-query-builder/) - Visual query builder from form fields, with SQL, MongoDB and JSON export