README.md: Update minimum node version

This website now require node 20.x

Author: malfisya

README.md

@@ -32,7 +32,7 @@ Please lint and spellcheck your contributions before creating a pull request. We
 
 To set up `nvm`, the Node Version Manager, follow the instructions listed [here](https://github.com/nvm-sh/nvm#readme). We recommend [setting up their shell integration](https://github.com/nvm-sh/nvm#deeper-shell-integration) as well, so you can automatically switch to the correct Node version when working on this project. Otherwise, ensure you run `nvm use`. This project requires the "current" supported release series of Node.
 
-You can validate you are using the latest by running `node --version`. Your version should be at least 19.x.
+You can validate you are using the latest by running `node --version`. Your version should be at least 20.x.
 
 ### Yarn