No program icon latest nightly, Mac OS

[timj79]

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Describe the bug
Program no longer has an icon, displays an empty placeholder icon instead

To Reproduce
Steps to reproduce the behavior:

1. Go to 'latest Macos nightly build'
2. Click on 'nightly_macos.dmg.'
3. open dmg
4. See error

3D Model and Slic3r Configuration Export
Please upload a ZIP archive containing a copy of the 3D model you are seeing this bug with and a CTRL-E export of the configuration used.

Expected behavior
Superslicer / slic3r icon should be shown

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: [MacOS]
• Version [11.2.3]

SuperSlicer
Version: 2.3.56.0
Build: Slic3r_2.3.56.0

Operating System: Macintosh
System Architecture: 64 bit
System Version: macOS Big Sur Version 11.2.3 (Build 20D91)
Total RAM size [MB]: 8,590MB
OpenGL installation
GL version: 2.1 Metal - 71.0.7
Vendor: Apple
Renderer: Apple M1
GLSL version: 1.20
Installed extensions:

Additional context
Add any other context about the problem here.