https://wccftech.com/windows-10-2020-build-19013/

Microsoft has released a fresh build to Windows Insiders in the Fast ring, delivering Windows 10 2020 Build 19013. Today's release brings more Kaomoji and ability for Windows Subsystem for Linux (WSL) 2 to release unused Linux memory back to your Windows machine.

The company also announced PowerToys 0.12, bringing a new utility and support for Dark Mode. Here is the complete changelog: