Add Override annotations where appropriate

By: md_5 <git@md-5.net>

paper-api/src/main/java/org/bukkit/material/Dispenser.java

@@ -31,6 +31,7 @@ public class Dispenser extends FurnaceAndDispenser {
         super(type, data);
     }
 
+    @Override
     public void setFacingDirection(BlockFace face) {
         byte data;
 
@@ -63,6 +64,7 @@ public class Dispenser extends FurnaceAndDispenser {
         setData(data);
     }
 
+    @Override
     public BlockFace getFacing() {
         int data = getData() & 0x7;