[bug] Linux Install script installs wrong version on certain arm systems

[scheidtp]

When executing the recommended installation command wget -qO - portal.spatiumportae.com | bash on systems where uname -m returns aarch64, the script installs the amd64 executable instead of the arm version.

This is because the script's architecture detection assumes an amd64 system when the output of uname -m contains the substring 64. Furthermore, the detection only interprets an output containing arm as arm system.

I would suggest moving the arm detection if case in front of the amd64 case and also adding aarch as possible arm substring.