Fixed two small typos in yesterday's changes (dotnet#16663)

* Fixed two small typos

* another typo

Author: Cam Soper

aspnetcore/security/authentication/azure-active-directory/index.md

@@ -24,7 +24,6 @@ These tutorials and samples demonstrate authentication in ASP.NET Core using Mic
 
 * [Enable your ASP.NET Core app to sign-in users and call web APIs using Azure AD V2](/samples/azure-samples/active-directory-aspnetcore-webapp-openidconnect-v2/enable-webapp-signin/): 
   * See [this associated video](https://channel9.msdn.com/Events/Build/2018/THR5001)
-  * Azure AD 
 
 * [Calling an ASP.NET Core 2.0 Web API from a WPF application using Azure AD V2](/samples/azure-samples/active-directory-dotnet-native-aspnetcore-v2/calling-an-aspnet-core-web-api-from-a-wpf-application-using-azure-ad-v2/): 
   * See [this associated video](https://channel9.msdn.com/Events/Build/2018/THR5000)

aspnetcore/security/authentication/azure-ad-b2c.md

@@ -155,5 +155,5 @@ Now that the ASP.NET Core app is configured to use Azure AD B2C for authenticati
 * [Enable multi-factor authentication](/azure/active-directory-b2c/active-directory-b2c-reference-mfa).
 * Configure additional identity providers, such as [Microsoft](/azure/active-directory-b2c/active-directory-b2c-setup-msa-app), [Facebook](/azure/active-directory-b2c/active-directory-b2c-setup-fb-app), [Google](/azure/active-directory-b2c/active-directory-b2c-setup-goog-app), [Amazon](/azure/active-directory-b2c/active-directory-b2c-setup-amzn-app), [Twitter](/azure/active-directory-b2c/active-directory-b2c-setup-twitter-app), and others.
 * [Use the Azure AD Graph API](/azure/active-directory-b2c/active-directory-b2c-devquickstarts-graph-dotnet) to retrieve additional user information, such as group membership, from the Azure AD B2C tenant.
-* [Secure an ASP.NET Core web API using Azure AD B2C](xref:security/authentication/azure-ad-b2c-webapi).
+* [Secure an ASP.NET Core web API using Azure AD B2C](https://azure.microsoft.com/resources/samples/active-directory-b2c-dotnetcore-webapi/).
 * [Call a .NET web API from a .NET web app using Azure AD B2C](/azure/active-directory-b2c/active-directory-b2c-devquickstarts-web-api-dotnet).

aspnetcore/toc.yml

@@ -897,7 +897,7 @@
                 - name: Protected web API
                   href: /azure/active-directory/develop/scenario-protected-web-api-overview
                 - name: Web API that calls other web APIs
-                  href: /azure/active-directory/develop/scenario-web-api-call-api-overview)
+                  href: /azure/active-directory/develop/scenario-web-api-call-api-overview
                 - name: Integrate Azure AD B2C into a web app
                   uid: security/authentication/azure-ad-b2c
             - name: Samples