[Chore] Release notes updates

[kodster28]

Summary

For products that only use the top-level /changelog and don't have a use case for a separate avenue of updates, collapsing their previous release-notes into the new changelog experience.

This is a longer-term fix version of the same pain point as #21822

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PR Change Summary

Updated the changelog experience by consolidating release notes for products that only utilize the top-level changelog.

• Replaced the ProductReleaseNotes component with ProductChangelog in the changelog file.
• Merged previous release notes into the new changelog format.
• Added new entries to the changelog for recent updates.

Modified Files

• src/content/docs/dns/changelog.mdx

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[github-actions]

Preview URL: https://e28c2f9b.preview.developers.cloudflare.com
Preview Branch URL: https://release-notes-migration-work.preview.developers.cloudflare.com

Files with changes (up to 15)

Original Link	Updated Link
https://developers.cloudflare.com/api-shield/changelog/	https://release-notes-migration-work.preview.developers.cloudflare.com/api-shield/changelog/
https://developers.cloudflare.com/fundamentals/changelog/	https://release-notes-migration-work.preview.developers.cloudflare.com/fundamentals/changelog/
https://developers.cloudflare.com/cache/changelog/	https://release-notes-migration-work.preview.developers.cloudflare.com/cache/changelog/
https://developers.cloudflare.com/dns/changelog/	https://release-notes-migration-work.preview.developers.cloudflare.com/dns/changelog/
https://developers.cloudflare.com/ssl/changelog/	https://release-notes-migration-work.preview.developers.cloudflare.com/ssl/changelog/
https://developers.cloudflare.com/logs/changelog/	https://release-notes-migration-work.preview.developers.cloudflare.com/logs/changelog/
https://developers.cloudflare.com/changelog/2025-02-04-easier-onboarding-for-csam-scanning-tool/	https://release-notes-migration-work.preview.developers.cloudflare.com/changelog/2025-02-04-easier-onboarding-for-csam-scanning-tool/
https://developers.cloudflare.com/changelog/2025-03-03-saml-oidc-fields-saml-transformations/	https://release-notes-migration-work.preview.developers.cloudflare.com/changelog/2025-03-03-saml-oidc-fields-saml-transformations/