docs: add Windows setup guide link to README

Author: aman-dev-maker

README.md

@@ -49,6 +49,7 @@ To get setup for development, see [this video if you prefer VS Code](https://you
 For detailed setup instructions, see:
 - [Linux setup guide](LINUX_SETUP.md)
 - [macOS setup guide](MACOS_SETUP.md)
+- [Windows setup guide](WINDOWS_SETUP.md)
 Detailed instructions can be found in the [Contributors guide](https://github.com/malariagen/malariagen-data-python/blob/master/CONTRIBUTING.md).
 
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