(AzureCXP) Updated Code Sectoin

Removed word new from the builder.build() code. Shouldn't require the new keyword. 

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cc: @jmprieur
GitHub Issue: https://github.com/MicrosoftDocs/azure-docs/issues/43324

Author: Frank Hu

articles/active-directory/develop/quickstart-v2-uwp.md

@@ -122,7 +122,7 @@ Then, MSAL is initialized using the following code:
 
 ```csharp
 public static IPublicClientApplication PublicClientApp;
-PublicClientApp = new PublicClientApplicationBuilder.Create(ClientId)
+PublicClientApp = PublicClientApplicationBuilder.Create(ClientId)
                                                     .Build();
 ```