Update howto-build-services-resilient-to-metadata-refresh.md

Author: hamidfadili

articles/active-directory/develop/howto-build-services-resilient-to-metadata-refresh.md

@@ -35,7 +35,7 @@ services.Configure<JwtBearerOptions>(AzureADDefaults.JwtBearerAuthenticationSche
     // shouldn’t be necessary as it’s true by default
     options.RefreshOnIssuerKeyNotFound = true;
     …
-};
+});
 ```
 
 ## ASP.NET/ OWIN