feat: Update About Section Content for Better Engagement

[akshay0611]

Summary: This PR updates the content of the about section to improve clarity, relevance, and engagement. The changes aim to better communicate the platform's strengths and value proposition.

Changes Made:

• Rewrote <p class="section-text"> to provide an overview of Cryptex's offerings.
• Rewrote <p class="item-text"> for each list item to highlight key features and benefits.
• Improved the alt attribute for the banner image to enhance accessibility and SEO.
• Ensured alignment with existing CSS styles and framework conventions.

Testing:

• Verified responsiveness across different screen sizes.
• Ensured proper rendering of the about section and its content.

Related Issue: Closes #6