Search for \( \mathrm{t}\overline{\mathrm{t}}\mathrm{H} \) production in the \( \mathrm{H}\to \mathrm{b}\overline{\mathrm{b}} \) decay channel with leptonic \( \mathrm{t}\overline{\mathrm{t}} \) decays in proton-proton collisions at \( \sqrt{s}=13 \) TeV