Correct syntax error in example in readme.md

Author: blueboxes

README.md

@@ -72,7 +72,7 @@ const options = {
 	// An Optional options for initializing the MSAL @see https://github.com/AzureAD/microsoft-authentication-library-for-js/wiki/MSAL-basics#configuration-options
 	redirectUri: "Your redirect URI",
 };
-const authProvider = new MicrosoftGraph.MSALAuthenticationProvider(clientId, scopes, options);
+const authProvider = new MicrosoftGraph.MSALAuthenticationProvider(clientId, graphScopes, options);
 ```
 
 #### Creating an instance of MSALAuthenticationProvider in node environment