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 <h2 class="h2 section-title"> to emphasize saving wildlife and nature.
• Updated <p class="section-text"> to clearly state the organization's mission and purpose.
• Rewrote <p class="tab-text"> for each tab item to highlight specific focus areas of the charity.
• Updated button text for grammatical correctness and improved user experience.
• 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 #8