[sql-server-2017-cumulative-update][sql-server-2019-cumulative-update] Old versions have broken download links

[flcdrg]

As per this conversation

It would be nice if we could include the fallback URL from the update catalog in the package. Would need to figure out if there's a way to query the catalog for the link as part of update.ps1.

[flcdrg]

Or maybe from these pages?

https://support.microsoft.com/en-us/topic/kb5008996-cumulative-update-15-for-sql-server-2019-4b6a8ee9-1c61-482d-914f-36e429901fb6