Update french_stop.txt

[quinzeromain]

Description

Adding the term 'ça' corresponding to the shortened form of 'that' Adding the term 'où' corresponding to "where" Adding the term 'elles' corresponding to the feminine form of 'they' Updating the comment for the term 'ou' corresponding to 'or' and not 'where'

Solution

Please provide a short description of the approach taken to implement your solution.

Tests

Please describe the tests you've developed or run to confirm this patch implements the feature or solves the problem.

Checklist

Please review the following and check all that apply:

• [ ] I have reviewed the guidelines for How to Contribute and my code conforms to the standards described there to the best of my ability.
• [ ] I have created a Jira issue and added the issue ID to my pull request title.
• [ ] I have given Solr maintainers access to contribute to my PR branch. (optional but recommended)
• [ ] I have developed this patch against the master branch.
• [ ] I have run ./gradlew check.
• [ ] I have added tests for my changes.
• [ ] I have added documentation for the Ref Guide (for Solr changes only).

[rmuir]

Hi: this list is automatically generated from snowball-website by gradle regenerate. Would you mind submitting this PR to the upstream https://github.com/snowballstem/snowball-website instead?