added some image support

Mage.Client/src/main/java/org/mage/plugins/card/dl/sources/ScryfallImageSupportCards.java

@@ -497,6 +497,9 @@ public class ScryfallImageSupportCards {
             add("KHC"); // Kaldheim Commander
             add("TSR"); // Time Spiral Remastered
             add("STX"); // Strixhaven: School of Mages
+            add("C21"); // Commander 2021 Edition
+            add("MH2"); // Modern Horizons 2
+            add("AFR"); // Adventures in the Forgotten Realms
         }
     };