update sample removing the version number (#1306)

* update sample removing the version number

* remove the date

Author: cloudmelon

samples/Extensions/Http/HttpFunction.cs

@@ -21,10 +21,10 @@ public static HttpResponseData Run([HttpTrigger(AuthorizationLevel.Anonymous, "g
             //</docsnippet_logging>
 
             var response = req.CreateResponse(HttpStatusCode.OK);
-            response.Headers.Add("Date", "Mon, 18 Jul 2016 16:06:00 GMT");
+           
             response.Headers.Add("Content-Type", "text/plain; charset=utf-8");
 
-            response.WriteString("Welcome to .NET 5!!");
+            response.WriteString("Welcome to .NET isolated worker !!");
 
             return response;
         }