Remove identity from URL

Author: craigshoemaker

articles/static-web-apps/authentication-authorization.md

@@ -113,7 +113,7 @@ https://identity.azurestaticapps.net/.auth/purge/<AUTHENTICATION_PROVIDER_NAME>
 To prevent the platform from providing this information on future requests to individual apps, submit a request to the following URL:
 
 ```url
-https://<WEB_APP_DOMAIN_NAME>/identity/.auth/purge/<AUTHENTICATION_PROVIDER_NAME>
+https://<WEB_APP_DOMAIN_NAME>/.auth/purge/<AUTHENTICATION_PROVIDER_NAME>
 ```
 
 ## System folder