submodule: bump openthread from b4282a8 to 8c70c78#984

dependabot[bot] wants to merge 1 commit into

mainopenthread/ot-nxp:mainfrom

dependabot/submodules/openthread-8c70c78openthread/ot-nxp:dependabot/submodules/openthread-8c70c78Copy head branch name to clipboard