fix small typo in fr translation

[nlegaillart]

Description:

Hello, just a very quick PR to fix a typo in the French translation of the installer (first step). I don't think the Review part is relevant for such a small change, correct me if I'm wrong.

Review

• Functional review done
• Potential edge cases thought about (behavior of the code with strange input, with strange internal state or possible interactions with other Matomo subsystems)
• Usability review done (is anything maybe unclear or think about anything that would cause people to reach out to support)
• Security review done
• Wording review done
• Code review done
• Tests were added if useful/possible
• Reviewed for breaking changes
• Developer changelog updated if needed
• Documentation added if needed
• Existing documentation updated if needed

[sgiehl]

Hi @nlegaillart. We are managing our translations on Weblate. I've updated the string there, so it will be included in one of the next translation updates coming from there.
If you have further improvements on translations feel free to simply create an account on weblate to fix translations there directly: https://hosted.weblate.org/projects/matomo/

[nlegaillart]

Oh I didn't know that, thanks @sgiehl for the hint, the fix, and the quick reply!