arm64 install issue

[Will-wastelander]

Describe the bug
Not sure if this is a bug, feature request, or a support request, but I figured I'd mark it as a bug, since it can't be installed via the current installer script.

To Reproduce
Steps to reproduce the behavior:

1. Install OctoPi 0.18.0 RC1 arm64
2. Run OctoDash install script
3. Install script fails, appears to be related to installing octodash_2.1.1_armv7l.deb and not octodash_2.1.1_arm64.deb

Expected behavior
As OctoPi becomes aarch64 friendly, the installer script should account for this.

General Information:

• Hardware [Raspberry Pi 4 4GB]
• OS Info [OctoPi 0.18.0 RC1 arm64]
• OctoDash Version [e.g. v2.1.1]
• OctoPrint Version [v1.4.2]

Additional context
releaseURL=$(curl -s "https://api.github.com/repos/UnchartedBull/OctoDash/releases/latest" | grep "browser_download_url.*armv7l.deb" | cut -d '"' -f 4)

[eliteSchwein]

https://sites.google.com/view/m1dn1ght-3d/downloads/unofficial-octodash-builds?authuser=0

Check this url out

[Will-wastelander]

I was able to get this working by adding the below to the install script. I'm not the best at writing scripts, but I can try to piece something together to make it work.

I'm not sure if it's the best way to do it, but it works for me.

#1157