Clarify why the rating is wrong for row 10472

Mission350Solutions.ipynb

@@ -217,7 +217,7 @@
     "id": "quFWJnigdw2_"
    },
    "source": [
-    "The row 10472 corresponds to the app _Life Made WI-Fi Touchscreen Photo Frame_, and we can see that the rating is 19. This is clearly off because the maximum rating for a Google Play app is 5. As a consequence, we'll delete this row."
+    "The row 10472 corresponds to the app _Life Made WI-Fi Touchscreen Photo Frame_, and we can see that the rating is 19. This is clearly off because the maximum rating for a Google Play app is 5 (as mentioned in the [discussions section](https://www.kaggle.com/lava18/google-play-store-apps/discussion/66015), this problem is caused by a missing value in the `'Category'` column). As a consequence, we'll delete this row. "
    ]
   },
   {