fr-FR.po: Mistranslation for "Save changes" and "Discard changes"

[artav4]

Description

Changes

Additional information

Tested on: <!-- OS including version ->

[boring-cyborg]

Thank you for opening your first PR! 🎉 We are very happy and would like to thank you very much for your contribution. If everything checks out, we'll make sure to review the PR as soon as possible and give feedback. In the meantime, to make the reviewing process as fast as possible, you can help us by checking the following things:

• Did you follow the JSStandard coding style? - Did you comment everywhere where the necessity of a piece of code or the
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Furthermore, make sure that the linter does not complain, which will check your code on every new commit. If the linter task fails, make sure to run yarn lint locally and check the file eslint_report.htm which will tell you precisely what went wrong.
Stay sharp, and thanks again!

[nathanlesage]

Looks good! Could you remove the lines that say "fuzzy" directly above these messages to indicate that these translations now have been fixed? Otherwise this is perfect and can be merged. Thank you!