Updating comment

Author: wiazur

Search/BingAutoSuggest/src/main/java/com/microsoft/azure/cognitiveservices/search/autosuggest/samples/BingAutoSuggestSample.java

@@ -65,7 +65,7 @@ public static void main(String[] args) {
         try {
             //=============================================================
             // Authenticate
-
+            // Add your Bing Autosuggest subscription key to your environment variables.
             final String subscriptionKey = System.getenv("BING_AUTOSUGGEST_SUBSCRIPTION_KEY");
             final String customConfigId = System.getenv("AZURE_BING_SAMPLES_CUSTOM_CONFIG_ID");