Comment 4 for bug 1937223

There were no outputs by `ubuntu-drivers list-oem` before using focal-proposed.
After using focal-proposed, `ubuntu-drivers list-oem` shows oem-somerville-kakuna-meta.
When I executed `sudo ubuntu-drivers install`, it will install oem-somerville-kakuna-meta 20.04~ubuntu1 from focal-proposed/main, and then upgrade to oem-somerville-kakuna-meta 20.04ubuntu8 from "http://dell.archive.canonical.com focal/somerville-kakuna".
After I reboot the system, the system boots by linux-image-5.10.0-1057-oem that meets our expectation.