Add UI for scrollbar in dark mode

[gjyotk]

Prerequisites

• I am an Open Source Contributor
• I checked to make sure that this issue has not already been filed

Description

In this issue, i am proposing an update in Scrollbar to match the dark-colour-aesthetic when dark mode is turned on. This will enhance its visibility and improve the overall user experience.

Objective:

• Updation in UI to maintain the dark-theme in scrollbar when using dark mode
• Enhance user experience of the website

I would appreciate your review of this request and would be delighted to initiate the process of creating a pull request for the implementation of this proposed modification. Your valuable feedback and guidance would be greatly welcomed.

Screenshots

Code of Conduct

• I follow Contributing Guidelines of this project.

[Rakesh9100]

Assigned @gjyotk Proceed!!