How to upgrade kernel when upgrading from Ubuntu 20.04 to 22.04.2 LTS?

Yesterday I upgraded from Ubuntu 20.04.6 LTS to Ubuntu 22.04.2 LTS. However, my kernel is still at the same version as before, at version 5.15.

Here is the output of the command uname -rs:

Linux 5.15.0-73-generic

Does anyone know how I can upgrade the kernel?