Merge pull request #44176 from dzsquared/master

fix for partition key in sample code

Author: ktoliver

articles/cosmos-db/sql-api-nodejs-application.md

@@ -111,7 +111,7 @@ Now that you have completed the initial setup and configuration, next you will w
     const debug = require('debug')('todo:taskDao')
 
     // For simplicity we'll set a constant partition key
-    const partitionKey = '0'
+    const partitionKey = undefined
     class TaskDao {
       /**
        * Manages reading, adding, and updating Tasks in Cosmos DB