BugFix #1175 Down Votes for a particular tutorial goes to negative

[lavish123409]

Description

I have tried to clip the downvotes going below zero. Now, the user can can only downvote till 0 and not beyond that.

Related Issue

1175 - Down Votes for a particular tutorial goes to negative

Motivation and Context

How Has This Been Tested?

Manually, the downvotes are not going beyond 0.

Screenshots or GIF (In case of UI changes):

Before

After

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [x] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [ ] I have added tests to cover my changes.
• [ ] All new and existing tests passed.

If this pull request is lacking somewhere or do I need to do something else, then kindly notify me.

[manzil-infinity180]

already have a pr for that issue

[lavish123409]

I am not able to see any PR linked to issue #1175. Nevertheless, should I delete this PR then?