(DOCSP-20551) Corrects background example (#228)

Author: sarahsimpers

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+    "restructuredtext.confPath": ""
+}

source/reference/pipeline/out.txt

@@ -646,24 +646,23 @@ pipeline that ends with the |out| stage in the background.
       .. example::
 
          .. code-block:: json 
-            :emphasize-lines: 16
-
-            db.foo.aggregate([
-              {
-                "$out" : {
-                  "s3" : {
-                    "bucket" : "my-s3-bucket",
-                    "region" : "us-east-1",
-                    "filename" : {
-                      "$toString" : "$sale-date"
-                    },
-                    "format" : {
-                      "name" : "json"
-                    }
-                  }
+            :emphasize-lines: 13
+
+
+            db.mySampleData.aggregate(
+              [
+                { 
+                  "$out": { 
+                    "atlas": { 
+                      "clusterName":"myTestCluster", 
+                      "db":"sampleDB", 
+                      "coll":"mySampleData" 
+                    } 
+                  } 
                 }
-              }
-            ], { background: true })
+              ], 
+              { "background" : true }
+            )
 
          |out| writes to |json| files in the root of the bucket in the 
          background. Each |json| file contains all of the documents