Open the Windows Settings and click on the Update & Security tab...

Then, go to Advanced options...

... and turn on the option to Receive updates for other Microsoft products...

...then go back and check for updates. If an update appears for the Windows Subsystem for Linux, install it, then restart Docker Desktop.

Note that the option to install Microsoft updates may be locked by your organization's IT policy. If so, please contact your IT team to enable it as needed.