submodule: bump openthread from `830572f` to `1024a1f` #986

Job	Run time
cancel-previous-runs	6s
Test Suite network-forming	22m 55s
Test Suite commissioning	8m 54s
Test Suite connectivity	22m 42s
Test Suite network-latency	2m 16s
Test Suite multicast-performance	2m 1s
Test Suite otns-performance	2m 9s
Test Suite network-limits	2m 2s
	1h 3m 5s

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