Only add goat horn once (#12001)

paper-server/patches/sources/net/minecraft/world/entity/animal/goat/Goat.java.patch

@@ -25,10 +25,11 @@
                  this.playEatingSound();
              }
  
-@@ -350,7 +_,7 @@
+@@ -349,8 +_,7 @@
+             double d1 = Mth.randomBetween(this.random, 0.3F, 0.7F);
              double d2 = Mth.randomBetween(this.random, -0.2F, 0.2F);
              ItemEntity itemEntity = new ItemEntity(this.level(), vec3.x(), vec3.y(), vec3.z(), itemStack, d, d1, d2);
-             this.level().addFreshEntity(itemEntity);
+-            this.level().addFreshEntity(itemEntity);
 -            return true;
 +            return this.spawnAtLocation((net.minecraft.server.level.ServerLevel) this.level(), itemEntity) != null; // Paper - Call EntityDropItemEvent
          }