manifest: openthread: Openthread upmerge to d9dd34e.
manifest: openthread: Openthread upmerge to d9dd34e.

This commit bumps openthread version.

Signed-off-by: Przemyslaw Bida <a50c93f369fde5722836c96336399b0b25c1b4ec@nordicsemi.no>

galak/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,galak/zephyr,finikorg/zephyr,galak/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr