@Aluru Jawahar - Thanks for reaching out and apologies for the inconvenience caused.
I have confirmed with the product team and was told that they are updating the template to point to v1.18.
V1.18 would be the last AKS version supported by this template.
The changes are currently in build and should get published in couple of days.
Hope this helps.
Please feel free to "Accept as Answer" if it helped answer your query.