appimage.sh is not setting correct permissions on updated .AppImage file

Captchas

[X] I have read the instructions.
[X] I have searched existing issues and avoided creating duplicates.
[X] I am not filing an enhancement request.

What happened?

When using the appimage.sh script to get updates, the new ZenBrowser.AppImage file does not have the executable permission set. The initial install does setthe permission correctly. It is the update process that seems to have the issue.

Reproducible?

[X] I have checked that this issue cannot be reproduced on Mozilla Firefox.

Version

1.0.x

What platform are you seeing the problem on?

Linux

Relevant log output

❯ bash <(curl https://updates.zen-browser.app/appimage.sh)
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 12497  100 12497    0     0   155k      0 --:--:-- --:--:-- --:--:--  156k
[i] ╔════════════════════════════════════════════════════╗
[i] ║                                                    ║
[i] ║    (ﾉ◕ヮ◕)ﾉ*:･ﾟ✧  Zen Browser Installer            ║
[i] ║                                                    ║
[i] ║    CPU: AVX2 Supported (Optimized Version)         ║
[i] ║    Status: Zen Browser Not Installed               ║
[i] ║    zsync: Installed (Needed for Updates)           ║
[i] ║                                                    ║
[i] ╚════════════════════════════════════════════════════╝
[i]
[i] (★^O^★) What would you like to do?
[i]   1) Install
[i]   2) Uninstall
[i]   3) Check for Updates
[i]   0) Exit
Enter your choice (0-3): 1
[i]
[w] Auto dedecting AVX2 support...
[w] Downloading Zen from https://github.com/zen-browser/desktop/releases/latest/download/zen-specific.AppImage
[i]
[i] Installing Zen Browser...
################################################################################################################################################################################################################################################## 100.0%
[i] Install completed successfully!
[i]
[i] (｡♥‿♥｡) Zen Browser installed successfully!
[i]
[i] Thank you for using Zen Browser Installer!

❯ ls -l ~/.local/share/AppImage/ZenBrowser*
.rwxrwxr-x 98M rholak rholak 24 Oct 15:38  /home/rholak/.local/share/AppImage/ZenBrowser.AppImage*

❯ bash <(curl https://updates.zen-browser.app/appimage.sh)
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 12497  100 12497    0     0   153k      0 --:--:-- --:--:-- --:--:--  154k
[i] ╔════════════════════════════════════════════════════╗
[i] ║                                                    ║
[i] ║    (ﾉ◕ヮ◕)ﾉ*:･ﾟ✧  Zen Browser Installer            ║
[i] ║                                                    ║
[i] ║    CPU: AVX2 Supported (Optimized Version)         ║
[i] ║    Status: Zen Browser Installed                   ║
[i] ║    zsync: Installed (Needed for Updates)           ║
[i] ║                                                    ║
[i] ╚════════════════════════════════════════════════════╝
[i]
[i] (★^O^★) What would you like to do?
[i]   1) Install
[i]   2) Uninstall
[i]   3) Check for Updates
[i]   0) Exit
Enter your choice (0-3): 3
[i]
[w] Auto dedecting AVX2 support...
[i] Checking for updates...
[i] Checking for Update...
################################################################################################################################################################################################################################################## 100.0%
[i] Checking for Update successfully!
[i] (｡♥‿♥｡) Congrats! Zen Browser is up-to-date!
[i]
[i] Thank you for using Zen Browser Installer!

❯ ls -l ~/.local/share/AppImage/ZenBrowser*
.rw------- 98M rholak rholak 19 Oct 21:31  /home/rholak/.local/share/AppImage/ZenBrowser.AppImage
.rwxrwxr-x 98M rholak rholak 24 Oct 15:38  /home/rholak/.local/share/AppImage/ZenBrowser.AppImage.zs-old*

zen-browser / desktop