The old example used a `refreshInterval` value of 12h for the ACR access token. This change reduces that to 3h instead, since that is the expiration time for Service Principal authentication tokens:
https://learn.microsoft.com/en-us/azure/container-registry/container-registry-authentication?tabs=azure-cli#service-principal
Service principals are not the only way to authenticate towards ACR. In fact, two other ways (`managedIdentity` and `workloadIdentity`) are also outlined in the docs. I was unable to find any documentation in Azure for the default expiration time for those tokens, so as far as I know it is always 3 hours. Thus I think we should reflect this in our examples.
Signed-off-by: Andreas Lindhé <7773090+lindhe@users.noreply.github.com>
