[SSL] Clarify criteria for HTTP validation with CHs

[RebeccaTamachiro]

Summary

PCX-17458

[hyperlint-ai]

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PR Change Summary

Clarified criteria for HTTP validation with custom hostnames in the certificate management documentation.

• Updated the criteria for certificate renewal based on hostname activity and wildcard status.
• Modified instructions for DCV processes for active and inactive custom hostnames.
• Removed unnecessary sections regarding when to use HTTP and TXT DCV.

Modified Files

• src/content/docs/cloudflare-for-platforms/cloudflare-for-saas/security/certificate-management/issue-and-validate/renew-certificates.mdx
• src/content/docs/cloudflare-for-platforms/cloudflare-for-saas/security/certificate-management/issue-and-validate/validate-certificates/delegated-dcv.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/cloudflare-for-platforms/cloudflare-for-saas/	@RebeccaTamachiro, @cloudflare/pcx-technical-writing

[github-actions]

Preview URL: https://fa49f0b1.preview.developers.cloudflare.com
Preview Branch URL: https://rebecca-ssl-review-dcv-and-renewal.preview.developers.cloudflare.com

Files with changes (up to 15)

Original Link	Updated Link
https://developers.cloudflare.com/cloudflare-for-platforms/cloudflare-for-saas/security/certificate-management/issue-and-validate/renew-certificates/	https://rebecca-ssl-review-dcv-and-renewal.preview.developers.cloudflare.com/cloudflare-for-platforms/cloudflare-for-saas/security/certificate-management/issue-and-validate/renew-certificates/
https://developers.cloudflare.com/cloudflare-for-platforms/cloudflare-for-saas/security/certificate-management/issue-and-validate/validate-certificates/delegated-dcv/	https://rebecca-ssl-review-dcv-and-renewal.preview.developers.cloudflare.com/cloudflare-for-platforms/cloudflare-for-saas/security/certificate-management/issue-and-validate/validate-certificates/delegated-dcv/

[windsurf-bot]

Looks good to me 🤙

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