🛠️ Fixes Issue

Closes #147

👨‍💻 Description

• This PR fixes the issue where the footer was not getting rendered right at the bottom of all the web pages, except the homepage, and was leaving some blank space at the bottom.
• Minor changes in index.css have been made where the min-height of main and footer have been adjusted accordingly.
• It successfully resolved the issue and makes the footer appear at the bottom as it should be.

📄 Type of Change

• [✅] Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update (adds or updates related documentation)

📷 Screenshots/GIFs

✅ Checklist

• [✅] I am a participant of GSSoC-ext.
• [✅] I have followed the contribution guidelines of this project.
• [✅] I have viewed deployment of my code.
• [✅] My changes generate no new warnings.
• I have added documentation to explain my changes.

🤝 GSSoC Participation

• [✅] This PR is submitted under the GSSoC program.
• I have taken prior approval for this feature/fix.