fix image detection to not accept ANY mimetype

utils/imagedetect.js

@@ -142,9 +142,12 @@ const checkImages = async (message, extraReturnTypes, video, sticker) => {
     url = url.replace(/.*\n\n/g, "")
     if (isValidUrl(url)){
       const mimetype = await getType(url, extraReturnTypes)
+      // console.log(mimetype)
+      if (mimetype && imageFormats.includes(mimetype)) {
         type = {name: "image", path: url, url: url, type: mimetype}
       }
     }
+  }
   
   // // first check the embeds
   // if (message.embeds.length !== 0) {