fix: Updated French translation of Longest Week Streak

[maelgangloff]

Description

The translation of Longest Week Streak was Plus longue de semaine séquence. This is not grammatically correct in French, which is why I propose this fix by replacing it with Plus longue séquence hebdomadaire.

Type of change

• [x ] Bug fix (added a non-breaking change which fixes an issue)

How Has This Been Tested?

• Tested locally with a valid username
• Tested locally with an invalid username
• Ran tests with composer test
• Added or updated test cases to test new features

Checklist:

• I have checked to make sure no other pull requests are open for this issue
• The code is properly formatted and is consistent with the existing code style
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings

[DenverCoder1]

Looks great! Thanks for the contribution 🎉