fix NameError of docstring in broadcast_object_list (#69810)
Summary:
This PR fixes NameError of docstring in broadcast_object_list.
cc pietern mrshenli pritamdamania87 zhaojuanmao satgera rohan-varma gqchen aazzolini osalpekar jiayisuse SciPioneer H-Huang
Pull Request resolved: https://github.com/pytorch/pytorch/pull/69810
Reviewed By: kimishpatel
Differential Revision: D33143167
Pulled By: jbschlosser
fbshipit-source-id: 99c076466ae4b4a332763b7546028c5097b417d7
