Fix key attribute while showing links on statistics page

[itsaakashpatel]

Fixes Issue

Closes: #9906

Changes proposed

• The issue was not to have a unique key for each link while displaying the list of links.
• A link.urlwill be the same when two or more links are identical. In this scenario, React lacks a unique key for each item in the list, posing a problem.
• I opted for link._id, a unique ID assigned to each link from the database, to address this issue.

Check List (Check all the applicable boxes)

• [x] My code follows the code style of this project.
• [ ] My change requires changes to the documentation.
• [ ] I have updated the documentation accordingly.
• [ ] All new and existing tests passed.
• [x] This PR does not contain plagiarized content.
• [x] The title of my pull request is a short description of the requested changes.

Screenshots

Before:

After:

Note to reviewers

None

[itsaakashpatel]

The proposed solution appears effective, but I'm curious about the reason for having repeated links in the list?

Thanks for approving the changes. I was thinking the same, and I decided to create a new issue to ask the product team to understand the reason behind it. Ideally, one link should suffice for each platform.