fix: 응원 보상에서 똑같은 재료는 나오지 않도록 변경 (#104)

src/main/java/com/tteokguk/tteokguk/support/domain/Support.java

@@ -82,7 +82,9 @@ private Support(
         this.supportIngredient = supportIngredient;
         this.access = access;
         this.message = message;
-        this.rewardIngredient = Ingredient.random();
+        do {
+            this.rewardIngredient = Ingredient.random();
+        } while (sender.getPrimaryIngredient() == this.rewardIngredient);
         this.rewardQuantity = random.nextInt(1, 7);
 
         sender.sendIngredient(receiver, supportIngredient);