Merge pull request #110521 from anthonychu/20200407-fix-readentitystate

Fix error in readEntityState

Author: PRMerger7

articles/azure-functions/durable/durable-functions-entities.md

@@ -227,7 +227,7 @@ const df = require("durable-functions");
 module.exports = async function (context) {
     const client = df.getClient(context);
     const entityId = new df.EntityId("Counter", "myCounter");
-    const stateResponse = await context.df.readEntityState(entityId);
+    const stateResponse = await client.readEntityState(entityId);
     return stateResponse.entityState;
 };
 ```