Update create_new_app_registration.md

Added Create a new app registration .md file

Author: Thanusree-Microsoft

docs/create_new_app_registration.md

@@ -1,4 +1,4 @@
-# Step 1a: Creating a new App Registration
+# Creating a new App Registration
 
 1. Click on `Home` and select `Microsoft Entra ID`.
 
@@ -28,7 +28,8 @@
 
 ![Web](images/Web.png)
 
-8. Enter the `web app URL` (Provide the app service name in place of XXXX) and Save. Then go back to [Step 1](#step-1-add-authentication-in-azure-app-service-configuration) and follow from _Point 4_ choose `Pick an existing app registration in this directory` from the Add an Identity Provider page and provide the newly registered App Name.
-E.g. https://appservicename.azurewebsites.net/.auth/login/aad/callback
+8. Enter the `web app URL` (Provide the app service name in place of XXXX) and Save. Then go back to [Set Up Authentication in Azure App Service](/docs/AppAuthentication.md) Step 1 page and follow from _Point 4_ choose `Pick an existing app registration in this directory` from the Add an Identity Provider page and provide the newly registered App Name.
+
+E.g. <<https://<< appservicename >>.azurewebsites.net/.auth/login/aad/callback>>
 
 ![Add Details](images/WebAppURL.png)