Proper way to create a multival type condition?

# Proper way to create a multival type condition?

## What happened

Issue fastly/terraform-provider-fastly#1090 (closed, 9 comments): Resource: [fastly_ngwaf_workspace_rule](https://registry.terraform.io/providers/fastly/fastly/latest/docs/resources/ngwaf_workspace_rule) I'm trying to deploy a ngwaf_workspace_rule using Terraform provider 8.0.0, but I'm running into a blocker when it comes to defining what the API describes as `multival` conditions: Example directly form the API, not Terraform.

## What works

[rcaril (maintainer)]: multival conditions on fastly_ngwaf_workspace_rule shipped in provider version 8.2.0. Upgrade the Fastly provider to >= 8.2.0 in your required_providers block and use the multival_condition block shown in the ngwaf_workspace_rule resource docs.

## Caveats

This comes from one real issue thread (gh:fastly/terraform-provider-fastly#1090); it is the verified fix or approach from that thread, not a general manual. Check your version of Fastly CDN first ,  maintainers often fix the underlying bug in a later release, and the thread may predate it.