Update pingfederate-saml.mdx

[kennyj42]

Our account team found this issue in a customer POC. You need to ensure you're also sending a certificate as part of the SAML response

Summary

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Documentation checklist

• 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• If a larger change - such as adding a new page- an issue has been opened in relation to any incorrect or out of date information that this PR fixes.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.

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PR Change Summary

Updated the SAML integration documentation for PingFederate to include the requirement for a certificate in the SAML response.

• Added instructions to include a matching certificate in the SAML response
• Updated step numbers for clarity
• Clarified settings for Signature Policy in PingFederate

Modified Files

• src/content/docs/cloudflare-one/identity/idp-integration/pingfederate-saml.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-one/identity/	@kennyj42, @ranbel, @cloudflare/pcx-technical-writing

[jroyal]

lgtm

[github-actions]

Preview URL: https://b89d8c00.preview.developers.cloudflare.com
Preview Branch URL: https://kennyj42-patch-6.preview.developers.cloudflare.com

Files with changes (up to 15)

Original Link	Updated Link
https://developers.cloudflare.com/cloudflare-one/identity/idp-integration/pingfederate-saml/	https://kennyj42-patch-6.preview.developers.cloudflare.com/cloudflare-one/identity/idp-integration/pingfederate-saml/