Installation instructions do not work in some platforms

[correaa]

When I use aarch64 the installations instructions do not work. I assume it is because there is no binary for this architecture. If so, it would be useful to document that in the instructions.

vscode ➜ /workspaces/boost-multi (master) $ curl -1sLf 'https://dl.cloudsmith.io/public/mull-project/mull-stable/setup.deb.sh' | sudo -E bash
vscode ➜ /workspaces/boost-multi (master) $ sudo apt-get update
Hit:1 http://ports.ubuntu.com/ubuntu-ports noble InRelease
Get:2 http://ports.ubuntu.com/ubuntu-ports noble-updates InRelease [126 kB]
Hit:3 http://ports.ubuntu.com/ubuntu-ports noble-backports InRelease
Hit:4 http://ports.ubuntu.com/ubuntu-ports noble-security InRelease
Fetched 126 kB in 4s (28.4 kB/s)
Reading package lists... Done
vscode ➜ /workspaces/boost-multi (master) $ sudo apt-get install mull-16
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
E: Unable to locate package mull-16
vscode ➜ /workspaces/boost-multi (master) $ uname -m
aarch64
vscode ➜ /workspaces/boost-multi (master) $ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 24.04.1 LTS
Release:        24.04
Codename:       noble

[AlexDenisov]

That's a good catch, we are only precompiling x86 binaries for Linux, and whatever default arch macos runners have.
I'll update the instructions.

[AlexDenisov]

Good news: GitHub rolled out arm64 Linux machines, so we can easily get arm64 support (WIP PR #1084)
Not so good news: builds on those machines are fragile and very unstable, so it will take time to get there.