Update 4-INSERT-DELETE.mdx

Author: sourabhbagrecha

Diff for: docs/40-CRUD/4-INSERT-DELETE.mdx

@@ -69,7 +69,7 @@ DELETE FROM reviews WHERE bookId = '0786222727';
   <summary>Answer</summary>
   <div>
     ```js
-      db.books.insertMany([
+      db.reviews.insertMany([
         {
           text: "Thrilling end.",
           rating: 4,
@@ -105,7 +105,7 @@ DELETE FROM reviews WHERE bookId = '0786222727';
   <summary>Answer</summary>
   <div>
     ```js
-      db.books.deleteMany({"bookId": "0786222727"})
+      db.reviews.deleteMany({"bookId": "0786222727"})
     ```
   </div>
 </details>