fixed json syntax error for zero2 configuration file found in deepspeed.md

[Yacklin]

What does this PR do?

It fixes Json syntax error for example zero2 json configuration file.

(I accidentatlly closed a PR related to it so i have to make another PR)

Before submitting

• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
• Did you read the contributor guideline,
  Pull Request section?
• Was this discussed/approved via a Github issue or the forum? Please add a link
  to it if that's the case.
• Did you make sure to update the documentation with your changes? Here are the
  documentation guidelines, and
  here are tips on formatting docstrings.
• Did you write any new necessary tests?

Who can review?

Anyone in the community is free to review the PR once the tests have passed. Feel free to tag
members/contributors who may be interested in your PR.
@SunMarc @MekkCyber @Rocketknight1

[MekkCyber]

Thanks

[HuggingFaceDocBuilderDev]

The docs for this PR live here. All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.

[Yacklin]

i need someone to approve lol

[Rocketknight1]

Merging!

[Yacklin]

Merging!

my GOAT!!!