Allow uploading of AVIF image formats

Need Help
#1

I have a jpeg which is of 50KB. I used ImageMagick to convert it from jpeg to avif

magick.exe tevaram.jpeg tevaram.avif

But I get You can’t upload files of this type.

image

My event.yaml file :

fields:
    image:
        label: Event Image
        type: fileupload
        mode: image
        imageWidth: 1200
        imageHeight: 800
        thumbOptions:
            mode: crop
            width: 300
            height: 200
        comment: Optional - event poster or image

How do I get mode: image to accept AVIF image formats ? Its supported by all browsers now - since 2 years I believe.