fix

Author: Liudon

layouts/_default/_markup/render-image.html

@@ -16,8 +16,8 @@
 	{{- if $responsiveImages -}}
 		{{- $imageTypes := slice -}}
 		{{- if and hugo.IsExtended (ne $src.MediaType.Type "image/webp") -}}
+			{{- $imageTypes = $imageTypes | append "avif" -}} // avif need the first
 			{{- $imageTypes = $imageTypes | append "webp" -}}
-			{{- $imageTypes = $imageTypes | append "avif" -}}
 		{{- end -}}
 		{{- if gt (index $respSizes 0) $src.Width -}}
 			{{- $respSizes = slice $src.Width -}}