Fixed the bug upvote and downvote

[mukilan2815]

Issue that this pull request solves

I have changed the logic like - User can only vote once that is upvote or downvote. Closes: #1004

Brief description of what is fixed or changed

Now users can able to upvote and downvote only once in each comment.

Types of changes

Put an x in the boxes that apply

• [ x] Bugfix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [x ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Documentation update (Documentation content changed)
• [ ] Other (please describe):

Checklist

Put an x in the boxes that apply

• [x ] My code follows the style guidelines of this project
• [ x] I have performed a self-review of my own code
• [ x] I have commented my code, particularly in hard-to-understand areas
• [x ] I have made corresponding changes to the documentation
• [x ] My changes generate no new warnings
• [x ] My changes does not break the current system and it passes all the current test cases.

Screenshots

Other information

Close this under GSSOC'24

[welcome[bot]]

Thank you and congrats🎉 for opening this pull request!💖

Please make sure you have followed our Contributing Guidelines.🙌 We will test out your code and reply in a bit with some pointers and requests.💿 There may be some errors, but don't worry! We'll work through them with you! 👍🎉😄 If you haven't filled the template out, Please do so!🚀 Feel free to join our Slack Community.💖 We have different channels for active discussions.✨ Hope you have a great time there!😄