Add noexcept specifier to digits2_i too make it match https://github.com/fmtlib/fmt/commit/3269c1cea53cb84ab971b36486627367cf73cadc
Add noexcept specifier to digits2_i too make it match https://github.com/fmtlib/fmt/commit/3269c1cea53cb84ab971b36486627367cf73cadc