https://wccftech.com/windows-10-2004-kb4540409-build-19041-113/

Microsoft has released a fresh new cumulative update to Windows 10 2004 (20H1), bringing the build number up to Build 19041.113. Windows 10 KB4540409 is now available for Windows Insiders in the Slow ring, bringing several general fixes and quality improvements. The update also carries one known issue.

As a reminder, Microsoft has also released ISO files for this upcoming version of the operating system, which means you can now clean install it and then download the latest cumulative updates.