Fix no sound in Ubuntu 20.04 after kernel 5.8 installation.

I recently installed the 5.8.0-41-generic kernel and I had no detected sound hardware after booting into the new kernel, but it turns out that a package was missing from my machine. I installed this package and then replugged my sound hardware and it worked straight away. ┌──[jason@192.168.1.2]─[~] └──╼ ╼ $ sudo apt install linux-modules-extra-$(uname -r) …