Improve French translations for MSIX Packaging

[Mysterious-Dev]

PR checklist

Quick summary of changes

Which issue does this PR relate to?

Applies to the following platforms:

• [x] WinUI
• [ ] WPF
• [ ] UWP

All is in the title ^^.

[Mysterious-Dev]

@microsoft-github-policy-service agree

[mikebattista]

The templatestrings file is managed by the localization pipeline so we can't accept that. Given the changes you're making differ from what the pipeline is returning us, I'd rather not take this change otherwise we'll be inconsistent.

[Mysterious-Dev]

So, can I help to improve the translations in some other way?