Update README.md

Author: TheCodeTraveler

README.md

@@ -322,7 +322,7 @@ public class Startup
 
     public void ConfigureServices(IServiceCollection services)
     {
-        builder.Services.AddGitHubApiStatusService(new AuthenticationHeaderValue(GitHubConstants.AuthScheme, GitHubConstants.PersonalAccessToken), new ProductHeaderValue("MyApp"))
+        services.AddGitHubApiStatusService(new AuthenticationHeaderValue(GitHubConstants.AuthScheme, GitHubConstants.PersonalAccessToken), new ProductHeaderValue("MyApp"))
             .ConfigurePrimaryHttpMessageHandler(config => new HttpClientHandler { AutomaticDecompression = System.Net.DecompressionMethods.GZip | System.Net.DecompressionMethods.Deflate });
 
         services.AddRazorPages();