Update index.html

[piyushsahujtp]

Sure, here's a template for your PR description:

---

PR Description 📜

Summary

This PR implements a feature to toggle between dark mode and light mode in the project. This enhancement addresses the user interface's accessibility and customization, improving the user experience.

Fixes #<your_issue_number>

---

Mark the task you have completed ✅

• I follow CONTRIBUTING GUIDELINE & CODE OF CONDUCT of this project.
• I have performed a self-review of my own code or work.
• I have commented my code, particularly in hard-to-understand areas.
• My changes generate no new warnings.
• I have followed proper naming conventions as shown in CONTRIBUTING GUIDELINE.
• I have added screenshots for review.

---

Add your screenshots(Optional) 📸

---

Thank you so much for contributing to our repository 💗

---

Feel free to adjust the content as needed and add the appropriate issue number and screenshot URLs.