Rewrite code samples README

Author: kengaderdus

1-Authentication/5-sign-in-express/README.md

@@ -99,7 +99,7 @@ You can register an app in your tenant by using two methods:
 * Manually register your apps in Microsoft Entra Admin center. To do, follow these steps:
 
     1. Sign in to the [Microsoft Entra admin center](https://entra.microsoft.com) as at least an [Application Developer](~/identity/role-based-access-control/permissions-reference.md#application-developer).
-    1. If you have access to multiple tenants, use the **Settings** icon ![settings icon]("admin-center-settings-icon.png" "Title") in the top menu to switch to your customer tenant from the **Directories + subscriptions** menu. 
+    1. If you have access to multiple tenants, use the **Settings** icon ![settings icon](admin-center-settings-icon.png "Title") in the top menu to switch to your customer tenant from the **Directories + subscriptions** menu. 
     1. Browse to **Identity** >**Applications** > **App registrations**.
     1. Select **+ New registration**.
     1. In the **Register an application** page that appears;