Build

submodule: bump openthread from `000f5fc` to `4c0d8f2` #1938

Job	Run time
Docker / metadata / Generate required metadata	1s
Docker / Build	3m 3s
Docker / Tag `latest` and publish to DockerHub	0s
Arm GNU Toolchain 12.2.Rel1	18m 29s
Arm GNU Toolchain 12.3.Rel1	16m 5s
	37m 38s

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