Fix bug in flatpak crate update script

[oskirby]

Description

Looks like there was a bug in the script used to update flatpak package dependencies. Notably the argument count check is incorrect which causes the script to run exclusively by pulling cargo.lock from main. Unfortunately this breaks PRs which attempt to update the Cargo.lock file, such as our dependabot PRs.

The fix is simply to correct the conditional check, but we also add some logging to the script to be extra sure where it is fetching the Cargo.lock file from.

Reference

Introduced by: #9798

Checklist

• My code follows the style guidelines for this project
• I have not added any packages that contain high risk or unknown licenses (GPL, LGPL, MPL, etc. consult with DevOps if in question)
• I have performed a self review of my own code
• I have commented my code PARTICULARLY in hard to understand areas
• I have added thorough tests where needed