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

[Francisco-mo]

Fast Ring link update to 2309

[prmerger-automator[bot]]

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

[learn-build-service-prod[bot]]

Learn Build status updates of commit f362263:

:white_check_mark: Validation status: passed

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

[learn-build-service-prod[bot]]

Learn Build status updates of commit f4b6ccd:

:white_check_mark: Validation status: passed

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