Add Download Brochure Button to Sponsors & Exhibitors Section

This Merge Request introduces a "Download the brochure" button to the Sponsors & Exhibitors section of the website. The button is placed on the right side of the section title for easy access.

Here's a breakdown of the changes:

Added "Download the brochure" button: A new FlatButton component is added to the right side of the "Sponsors & Exhibitors" title. The button is linked to the brochure's Typeform page (https://form.typeform.com/to/LiZ7xPpT). The button's design is consistent with the rest of the website, featuring a white background, rounded corners, and a shadow effect.

Improved section layout: The section layout is updated to accommodate the new button. The title and the button are placed in a flex container with justify-between and items-center classes to ensure they are aligned properly.

Minor styling adjustments: Some minor styling adjustments are made to maintain consistency and improve the overall look of the section. This includes adding some padding to the container and adjusting the position of the button.

This change allows users to easily download the brochure, providing them with more information about the sponsors and exhibitors. It also enhances the user experience by making the brochure more accessible.

Please review the changes and let me know if there are any questions or if there's anything else I can help with. Thank you!