feat: Update Donate Section Content for Better Engagement

[akshay0611]

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

Changes Made:

• Rewrote <h3 class="h3 card-title"> to focus on specific causes and animals.
• Updated progress values and amounts raised/goal data for each card.
• Improved alt attributes for images to enhance accessibility and SEO.
• Updated button text to encourage immediate action.
• Ensured alignment with existing CSS styles and framework conventions.

Testing:

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

Related Issue: Closes #12