Update to Meteor-Rejects to 1.21.10

src/main/java/anticope/rejects/modules/ObsidianFarm.java

@@ -52,7 +52,7 @@ public class ObsidianFarm extends Module {
                     return;
                 }
             }
-            mc.player.getInventory().selectedSlot = pickAxe;
+            ((anticope.rejects.mixin.PlayerInventoryAccessor) mc.player.getInventory()).setSelectedSlot(pickAxe);
         }
 
         BlockPos obsidian = findObsidian();