Add Github icon to the index.html

[Rishav1707]

Purpose

The purpose of this Pull Request is to fix #168

Goals

• This feature will fix the GitHub icon loading in the social media icons.

Approach

• Adding the new png link in the index.html file.

Screenshots

Before

After

Preview Link

https://pr-176-NEW-YOSHITHA-WEBSITE.surge.sh/

Checklist

• [x] This PR doesn't commit any keys, passwords, tokens, usernames, or other secrets.
• [x] I have read and understood the development best practices guidelines
• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation

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