Fix error message label and docstring default in load_sharded_checkpoint (#44523)
fix: correct error message label and docstring default in load_sharded_checkpoint
Fix two bugs in load_sharded_checkpoint:
1. Copy-paste error: error message for unexpected_keys incorrectly said
"Missing key(s)" instead of "Unexpected key(s)" (line 1108)
2. Docstring for prefer_safe said defaults to False but actual default
in function signature is True
Signed-off-by: JiangNan <1394485448@qq.com>
Co-authored-by: Marc Sun <57196510+SunMarc@users.noreply.github.com>