`vector_algorithms.cpp`: `return;` missing in `__std_bitset_to_string_1` / `_2`

[AlexGuteniev]

The fallback is only needed for ARM64EC and _Use_sse2() == false modes.
It should not be active code path normally.

STL/stl/src/vector_algorithms.cpp

Lines 1918 to 1928 in 192a840

	_Dest[_Ix] = _Tmpd[_Ix];
	}
	}
	}
	#endif // !defined(_M_ARM64EC)
	const auto _Arr = reinterpret_cast<const uint8_t*>(_Src);
	for (size_t _Ix = 0; _Ix < _Size_bits; ++_Ix) {
	_Dest[_Size_bits - 1 - _Ix] = ((_Arr[_Ix >> 3] >> (_Ix & 7)) & 1) != 0 ? _Elem1 : _Elem0;
	}
	}

[AlexGuteniev]

I also think benchmarking should be re-done to see if the vectorization threshold can be lowered.