Update fr_FR translation

[BLeQuerrec]

This translation uses a gender neutral variant for French.

[BLeQuerrec]

Not sure if tests with hardcoded translations are still relevant or if those hardcoded values should also be edited.

[jwag956]

Yes - I think they are valuable - and sorry that I used French as the test language!

Those tests make sure that we are really properly grabbing the correct file and properly configuring babel/pybabel.

If you would - please change the tests to match your changes.

Thanks

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.52%. Comparing base (2b05b49) to head (56eed48).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1128   +/-   ##
=======================================
  Coverage   98.52%   98.52%           
=======================================
  Files          40       40           
  Lines        5008     5008           
=======================================
  Hits         4934     4934           
  Misses         74       74           

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[BLeQuerrec]

OK, PR ready. Lint test still fails due to an outdated lib, but it is out of the scope of this PR.

[jwag956]

Lint is failing (flake8) because 2 lines are too long.....