Summary

The info at https://developers.cloudflare.com/cache/how-to/cache-rules/terraform-example/ is outdated and cause Inappropriate value for attribute when apply.

Current schema at https://registry.terraform.io/providers/cloudflare/cloudflare/latest/docs/resources/ruleset#nested-schema-for-rulesaction_parameterscache_keycustom_keyquery_stringexclude requires query_string to have all or list as a key.

Screenshots (optional)

Documentation checklist

• Is there a changelog entry (guidelines)? If you don't add one for something awesome and new (however small) — how will our customers find out? Changelogs are automatically posted to RSS feeds, the Discord, and X.
• The documentation style guide has been adhered to.
• If a larger change - such as adding a new page- an issue has been opened in relation to any incorrect or out of date information that this PR fixes.
• Files which have changed name or location have been allocated redirects.