[WAF] Add note about SDD

[pedrosousa]

Summary

No ticket. Mentioned in internal chat.

[hyperlint-ai]

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PR Change Summary

Added a note regarding the limitations of Cloudflare Sensitive Data Detection in the documentation.

• Mentioned that Cloudflare Sensitive Data Detection does not support matched payload logging.
• Updated the documentation to clarify the capabilities of Sensitive Data Detection.

Modified Files

• src/content/docs/waf/managed-rules/reference/sensitive-data-detection.mdx

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[github-actions]

This pull request requires reviews from CODEOWNERS as it changes files that match the following patterns:

Pattern	Owners
/src/content/docs/waf/	@pedrosousa, @cloudflare/firewall, @cloudflare/pcx-technical-writing

[github-actions]

Preview URL: https://4f6536dc.preview.developers.cloudflare.com
Preview Branch URL: https://pedro-2025-05-16-waf-update-sdd.preview.developers.cloudflare.com

Files with changes (up to 15)

Original Link	Updated Link
https://developers.cloudflare.com/waf/managed-rules/reference/sensitive-data-detection/	https://pedro-2025-05-16-waf-update-sdd.preview.developers.cloudflare.com/waf/managed-rules/reference/sensitive-data-detection/