submodule: bump openthread from `830572f` to `37144f0` #963

Job	Run time
cancel-previous-runs	8s
Test Suite network-forming	22m 50s
Test Suite commissioning	10m 23s
Test Suite connectivity	22m 42s
Test Suite network-latency	1m 59s
Test Suite multicast-performance	1m 49s
Test Suite otns-performance	1m 53s
Test Suite network-limits	2m 24s
	1h 4m 8s

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