submodule: bump openthread from 8bc2504 to ca9a731#191

dependabot[bot] wants to merge 1 commit into

thread-v1.3-tiTexasInstruments/ot-ti:thread-v1.3-tifrom

dependabot/submodules/openthread-ca9a731TexasInstruments/ot-ti:dependabot/submodules/openthread-ca9a731Copy head branch name to clipboard