Update screenshots in appdata

Author: deepbluev7

resources/nheko.appdata.xml

@@ -38,16 +38,19 @@
   </content_rating>
   <screenshots>
     <screenshot type="default">
-      <image>https://nheko-reborn.github.io/images/screenshots/chat-resized.png</image>
+      <image>https://nheko-reborn.github.io/images/screenshots/chat.png</image>
     </screenshot>
     <screenshot>
-      <image>https://nheko-reborn.github.io/images/screenshots/Start-resized.png</image>
+      <image>https://nheko-reborn.github.io/images/screenshots/Start.png</image>
     </screenshot>
     <screenshot>
-      <image>https://nheko-reborn.github.io/images/screenshots/settings-resized.png</image>
+      <image>https://nheko-reborn.github.io/images/screenshots/settings.png</image>
     </screenshot>
     <screenshot>
-      <image>https://nheko-reborn.github.io/images/screenshots/login-resized.png</image>
+      <image>https://nheko-reborn.github.io/images/screenshots/login.png</image>
+    </screenshot>
+    <screenshot>
+      <image>https://nheko-reborn.github.io/images/screenshots/mobile.png</image>
     </screenshot>
   </screenshots>
   <url type="homepage">https://github.com/Nheko-Reborn/nheko</url>