docs: reformat sorting of sort function

[anudeeps0306]

Added docstring to sort function

Close #779

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• Did you add a function?
• Did you add the tests?
• Did you follow the steps we provided?

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[anudeeps0306]

Hello, @theRealBird , could you please review my pull request?

[Ishticode]

Hi @anudeeps0306
Thanks for the PR.
We don't add docstring to the backend functions as this PR seems to add the docstring to ivy/functional/backends/jax/sorting.py.
The docstring already exist where it should be i.e. in ivy/functional/ivy/sorting.py.
please check the first paragraph here.
Therefore I will close this PR. If you think otherwise pls feel free to reopen. Thanks 🙂️