Auto-update appimage for Linux

[Cyber-Syntax]

• Hello, I wrote a script to update appimage fast. This script can be a time saver for those who do not know coding, it was taking a lot of my time at the time.

• I also wrote a more advanced version of this 🦄 my-unicorn , but since I am new to python, I recommend everyone to use it carefully.

[johannesjo]

Thank you very much for sharing this!!! 🥳🥳🥳