Update whats-new-in-version-2309.md

[Francisco-mo]

Fast Ring link update to 2309

[prmerger-automator]

@Francisco-mo : Thanks for your contribution! The author(s) have been notified to review your proposed change.

[learn-build-service-prod]

Learn Build status updates of commit f362263:

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[learn-build-service-prod]

Learn Build status updates of commit f4b6ccd:

✅ Validation status: passed

File	Status	Preview URL	Details
memdocs/configmgr/core/plan-design/changes/whats-new-in-version-2309.md	✅Succeeded

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel

[dougeby]

Fixed conflict. I defer to @PalikaSingh to approve this change.

[PalikaSingh]

Thank you for your feedback. This change is already updated. Please close the PR.