feat: Update Testimonial Section Content for Better Engagement

[akshay0611]

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

Changes Made:

• Rewrote <blockquote class="testi-text"> to highlight the charity's impact on wildlife and nature.
• Updated <h3 class="testi-name"> and <p class="testi-title"> to reflect an environmental advocate.
• Improved alt attributes for images 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 testimonial section and its content.

Related Issue: Closes #14