Fix typos in README of DTensor (#102813)
Fix typos in README of DTensor. But there is still a problem to be fixed. I reported an error when I tried to use distribute_module with shard_params. I show the specific error message in issue https://github.com/pytorch/pytorch/issues/102812.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/102813
Approved by: https://github.com/wanchaol
