DOCSP-13901: correct missed update (#132)

Author: Chris Cho

source/usage-examples.txt

@@ -53,7 +53,7 @@ with your instance of MongoDB:
 
    // Replace the following with your MongoDB deployment's connection string.
    const uri =
-      "mongodb+srv://<user>:<password>@<cluster-url>?retryWrites=true&w=majority";
+      "mongodb+srv://<user>:<password>@<cluster-url>?retryWrites=true&writeConcern=majority";
 
 You can use the :guides:`Atlas Connectivity Guide
 </cloud/connectionstring/>` to enable connectivity to your instance of