Options for Log Analytics Retention

For the options:
https://azure.github.io/Azure-Landing-Zones/accelerator/startermodules/terraform-platform-landing-zone/options/

Please can we have a documented approach to adjust the Log Analytics retention?

Thank you

Start with the Terraform platform landing zone options page linked in the issue and review how its existing options are documented. Add a documented approach for adjusting Log Analytics retention, with enough context for users to apply it; done means the approach appears clearly on that options documentation page.

Written by the indexing model from the issue text.