Fix: Correct path passed to bootstrap.exe by using parent directory of app_path

[cary-rowen]

Link to issue number:

None

Summary of the issue:

Due to recent changes in PyInstaller, bootstrap.exe was receiving an incorrect path. Specifically, paths.app_path() was returning the _internal directory within the bookworm installation, instead of the expected main bookworm installation directory.

Description of how this pull request fixes the issue:

This pull request modifies the path passed to bootstrap.exe by using the parent directory of paths.app_path(). This ensures that the correct bookworm installation directory is used, thereby resolving the update process issues.

Testing performed:

• Verified that the update process completes successfully with the correct directory passed to bootstrap.exe.
• Checked the application behavior after the update to ensure there are no regressions.

Known issues with pull request:

• None identified at this time.