changed link color in dark mode

[AryanBabber]

Changes proposed

Lightened the link color when switched to dark mode to improve readability

Check List (Check all the applicable boxes)

• My code follows the code style of this project.
• All new and existing tests passed.
• This PR does not contain plagiarized content.
• The title of my pull request is a short description of the requested changes.

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Note to reviewers

[github-actions]

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[Vyvy-vi]

Thanks for contributing to LinkFree. There's a prior PR opened for this issue #1929, and the author of that PR was assigned to issue #1926, and we'd have to close this PR in favour of that one.

It would be beneficial if you could ask for getting assigned to an issue, in order to prevent clashes like this.