Fixes #107737 SGD doc blank line (#107738)
docs preview brings joy
<img width="774" alt="image" src="https://github.com/pytorch/pytorch/assets/31798555/1bfaae64-16f2-448a-8af2-36303d2845db">
Pull Request resolved: https://github.com/pytorch/pytorch/pull/107738
Approved by: https://github.com/mikaylagawarecki
