Build

submodule: bump openthread from `4e9d362` to `d1147d6` #2206

Job	Run time
Docker / metadata / Generate required metadata	1s
Docker / Build	3m 6s
Arm GNU Toolchain 12.2.Rel1	19m 48s
Arm GNU Toolchain 12.3.Rel1	19m 11s
DockerHub Publish	0s
	42m 6s

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