Postman collection link outdated

[jjcv2304]

In the page https://github.com/AzureAD/SCIMReferenceCode/wiki/Test-Your-SCIM-Endpoint there is a link named https://aka.ms/ProvisioningPostman pointing to https://www.postman.com/collections/d9541c318fbe2c83b62c that json file is not matching the last one on master https://github.com/AzureAD/SCIMReferenceCode/blob/master/PostmanCollection.json which contains at least one bug-fix https://github.com/AzureAD/SCIMReferenceCode/issues/19