Update of the French version of the Astar portal

[Gunit2481]

• Review of the French version of the Astar portal
• Modification of some words for a more accurate and correct translation

Pull Request Summary

Describe what changes this pull request makes to the repository

Check list

• contains breaking changes
• adds new feature
• modifies existing feature (bug fix or improvements)
• relies on other tasks
• documentation changes
• tested on mobile devices

Release notes:

• (ex: feat: updated dApp staking to V2)
• (ex: fix: modified styling bugs on the Assets page)

This pull request makes the following changes:

Adds

• (ex: Add feature A)

Fixes

• (ex: Fix validation function)

Changes

• (ex: Change document B)

To-dos

*Feel free to remove this section if it's not applicable

• (ex: add user list)

[github-actions]

Visit the preview URL for this PR (updated for commit 5947b3d):

https://astar-apps--pr698-gunit2481-patch-2-kwgtdt9n.web.app

_{(expires Fri, 03 Mar 2023 09:39:53 GMT)}

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_{Sign: dd76fe72958fe2910fef9d53f0b4539b82b849db}

[Kahonnohak]

LGTM