feat: Update Contact Section Content for Better Engagement in Bookish

[akshay0611]

Summary: This PR updates the content of the contact 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-subtitle"> to make it more inviting and conversational.
• Rewrote <h2 class="h2 section-title"> to emphasize connection and collaboration.
• Ensured alignment with existing CSS styles and framework conventions.

Testing:

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

Related Issue: Closes #17