Updated image format prioritisation

Accelerated Domains now prioritizes the AVIF image format over WebP when serving images. This change reflects our ongoing commitment to improving performance and optimizing user experiences.

Why this is a good idea:

Better Compression: AVIF offers superior compression compared to WebP, meaning smaller file sizes without sacrificing image quality. This leads to faster load times and reduced bandwidth usage.
Higher Image Quality: AVIF supports more advanced features like better color depth and transparency handling, allowing for crisper and more vibrant visuals.
Environmental Impact: By delivering smaller image sizes, we're reducing energy consumption for data transfer, aligning with Servebolt's sustainability goals.

This update will ensure faster load times, enhanced visual experiences, and a more eco-friendly approach to image delivery across Accelerated Domains.