This upgrade and the upgrade of the underlying operating system described in this post: Upgrading the underlying operating system for the Docker executor - 18.04 to 20.04 are now complete.
The upgrade to the underlying OS included an upgrade of the kernel from 5.4 to 5.11. You can view the kernel and OS version being used by a job by outputting “uname -r”.
If you are experiencing issues with the new kernel and/or OS, please comment below.