Doesn't work on arm64 despite having package for it

```
~ ❯ flatpak run com.github.Anuken.Mindustry
[E] arc.util.ArcRuntimeException: Couldn't load shared library 'libarcarm64.so' for target: Linux, 64-bit
at arc.util.SharedLibraryLoader.load(SharedLibraryLoader.java:84)
at arc.util.ArcNativesLoader.load(ArcNativesLoader.java:14)
at arc.backend.sdl.SdlApplication.init(SdlApplication.java:107)
at arc.backend.sdl.SdlApplication.(SdlApplication.java:35)
at mindustry.desktop.DesktopLauncher.main(DesktopLauncher.java:39)
Caused by: arc.util.ArcRuntimeException: Unable to read file for extraction: libarcarm64.so
at arc.util.SharedLibraryLoader.readFile(SharedLibraryLoader.java:93)
at arc.util.SharedLibraryLoader.loadFile(SharedLibraryLoader.java:253)
at arc.util.SharedLibraryLoader.load(SharedLibraryLoader.java:81)
... 4 more
```

```
OS: Fedora Linux Asahi Remix 40 (Workstation Edition) aarch64
Host: Apple MacBook Air (13-inch, M2, 2022)
Kernel: 6.8.10-400.asahi.fc40.aarch64+16k

Packages: 2074 (rpm), 19 (flatpak)
DE: GNOME 46.2
```

Arm package should probably be removed until the project actually supports it