Update db.collection.findOneAndDelete.txt

Author: samyzhang

source/reference/method/db.collection.findOneAndDelete.txt

@@ -94,7 +94,7 @@ Examples
 Delete A Document
 ~~~~~~~~~~~~~~~~~~
 
-The ``grades`` collection contains documents similar to the following:
+The ``scores`` collection contains documents similar to the following:
 
 .. code-block:: javascript
 
@@ -125,7 +125,7 @@ The operation returns the *original* document that has been deleted:
 Sort And Delete A Document
 ~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-The ``grades`` collection contains documents similar to the following:
+The ``scores`` collection contains documents similar to the following:
 
 .. code-block:: javascript