Detect image/avif as an image

src/plugins/irc-events/link.js

@@ -209,6 +209,7 @@ function parse(msg, chan, preview, res, client) {
 		case "image/jpg":
 		case "image/jpeg":
 		case "image/webp":
+		case "image/avif":
 			if (!Helper.config.prefetchStorage && Helper.config.disableMediaPreview) {
 				return removePreview(msg, preview);
 			}

src/plugins/uploader.js

@@ -24,6 +24,7 @@ const inlineContentDispositionTypes = [
 	"image/jpeg",
 	"image/png",
 	"image/webp",
+	"image/avif",
 	"text/plain",
 	"video/mp4",
 	"video/ogg",