Update flathub screenshots

flatpak/io.github.aandrew_me.ytdn.metainfo.xml

@@ -24,11 +24,11 @@
   <screenshots>
     <screenshot type="default">
       <image>
-        https://user-images.githubusercontent.com/66430340/238856286-62efbca0-28b8-4016-bcf2-1a14bcaa782c.jpg</image>
+        https://github.com/aandrew-me/ytDownloader/assets/66430340/2f6695e7-6ca0-4f7c-91a0-0ad735c1e3af</image>
     </screenshot>
     <screenshot>
       <image>
-        https://user-images.githubusercontent.com/66430340/238856317-34f5270f-bdea-460e-8622-6459cd147b73.jpg</image>
+        https://github.com/aandrew-me/ytDownloader/assets/66430340/3c974ab0-8257-4b8a-88ec-ee6bd119751e</image>
     </screenshot>
   </screenshots>
   <url type="homepage">https://github.com/aandrew-me/ytDownloader</url>