Update to 23.10

[sydhds]

• https://ubuntu.com/blog/tpm-backed-full-disk-encryption-is-coming-to-ubuntu
• https://ubuntu.com/blog/ubuntu-23-10-restricted-unprivileged-user-namespaces:

In order to turn this feature on, use the following command:

sudo sysctl -w kernel.apparmor_restrict_unprivileged_unconfined=1 sudo sysctl -w kernel.apparmor_restrict_unprivileged_userns=1