submodule: bump openthread from 8c70c78 to 7cbfb8e#974

jwhui merged 1 commit into

mainopenthread/ot-qorvo:mainfrom

dependabot/submodules/openthread-7cbfb8eopenthread/ot-qorvo:dependabot/submodules/openthread-7cbfb8eCopy head branch name to clipboard