Update fr.yaml with scan comparision messages

[Phantomwise]

Checklist

• I have followed the Contributor Guidelines.
  • Didn't go through any test (not qualified to do anything but translate)
• The code has been thoroughly tested in my local development environment with flake8 and pylint.
  • Same
• The code is Python 3 compatible.
  • Same
• The code follows the PEP8 styling guidelines with 4 spaces indentation.
  • No changes to the syntax, so if the original file follows it then the translation does too
• This Pull Request relates to only one issue or only one feature
• I have referenced the corresponding issue number in my commit message
  • Translation requested in Translations needed for comparison functionality messages #905
• I have added the relevant documentation.
• My branch is up-to-date with the Upstream master branch.

Changes proposed in this pull request

Your development environment

• OS: x
• OS Version: x
• Python Version: x

[Phantomwise]

Sorry, it seems that while I was writing the PR there was a commit to the base branch so now it says "out-of-date" -___-

Edit: possibly fixed now

[arkid15r]

Awesome! LGTM!

[securestep9]

Thank you @Phantomwise !