fix typo

Author: zhiyuanliang-ms

articles/azure-app-configuration/quickstart-feature-flag-javascript.md

@@ -35,7 +35,7 @@ Add a feature flag called *Beta* to the App Configuration store and leave **Labe
 
 1. Go to the *app-configuration-quickstart* directory that you created in the quickstart and install the Feature Management by using the `npm install` command.
 
-    ```console
+    ``` console
     npm install @microsoft/feature-management
     ```