docs(os): Clarify hostname choice (#1)

README.md

@@ -54,7 +54,8 @@ After installation you're going to want to at least touch these points in your n
 * Package manager hook: `pacman` does not have a hook to do ZFS snapshots
     * See [this GitHub gist](https://gist.github.com/Soulsuke/6a7d1f09f7fef968a2f32e0ff32a5c4c#file-arch_on_zfs-txt-L238) and [zfs-snapshotter.bash](https://github.com/Soulsuke/arch-zfs-tools/blob/master/zfs-snapshotter.bash) for inspiration
 * Hostname: Installation chose a pseudo-randomly generated 8-character string with `pwgen`
-* Unprivileged user accounts: The OS was installed `root` and unprivileged `build`
+    * Check `hostnamectl set-hostname <hostname>`
+* Unprivileged user accounts: The OS was installed with `root` and unprivileged `build` users
 * Passwords
     * ZFS: The password for all datasets underneath `zpool` is `password`.
     * Local `root` account: The local `root` account's password is `password`.