Code sample corrected to use HttpClient

Author: rkapadia15

articles/azure-functions/functions-dotnet-dependency-injection.md

@@ -80,6 +80,7 @@ using Microsoft.Azure.WebJobs;
 using Microsoft.Azure.WebJobs.Extensions.Http;
 using Microsoft.AspNetCore.Http;
 using Microsoft.Extensions.Logging;
+using System.Net.Http;
 
 namespace MyNamespace
 {
@@ -88,10 +89,10 @@ namespace MyNamespace
         private readonly IMyService _service;
         private readonly HttpClient _client;
 
-        public HttpTrigger(IMyService service, IHttpClientFactory httpClientFactory)
+        public HttpTrigger(IMyService service, HttpClient httpClient)
         {
             _service = service;
-            _client = httpClientFactory.CreateClient();
+            _client = httpClient;
         }
 
         [FunctionName("GetPosts")]