submodule: bump openthread from `830572f` to `d95b44c` #966

Job	Run time
cancel-previous-runs	7s
Test Suite network-forming	23m 8s
Test Suite commissioning	8m 46s
Test Suite connectivity	22m 20s
Test Suite network-latency	2m 8s
Test Suite multicast-performance	2m 39s
Test Suite otns-performance	1m 53s
Test Suite network-limits	1m 53s
	1h 2m 54s

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