[docs] [issue26213] Document BUILD_*_UNPACK opcodes

Brett Cannon added the comment: There are also BUILD_SET_UNPACK and BUILD_MAP_UNPACK as well. ---------- title: Document BUILD_LIST_UNPACK & BUILD_TUPLE_UNPACK -> Document BUILD_*_UNPACK opcodes _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue26213> _______________________________________