chore: Update contributors.css styling for animation and button weight

[Dewansh07]

Problem

The hover behavior for the "Load More" button within the .box element caused inconsistent UI behavior due to large size changes, which affected the overall visual appeal and responsiveness of the component.

Solution

Adjusted the hover effect by changing the font-weight from 500 to 600 and adding a shadow effect to maintain a sleek and consistent appearance when the button is hovered.

Changes Proposed

• 1. Changed font-weight from 500 to 600 in the .box #loadMore:hover selector to reduce the size difference and keep the UI stable during hover.
• 2. Added box-shadow: inset 120px 0 0 0 #fe0c43 to the hover state for a more subtle, professional animation.
• 3. Implemented display: flex with justify-content: center and align-items: center for the #animation to center content and improve layout alignment.

Other Changes

• Refactored the CSS for clarity and consistency across the stylesheet.
• Updated hover effects for better user experience and responsiveness.