Update “Additional Commands” doc under litmusctl usage

[PriteshKiri]

Description
The documentation for “Additional Commands” under the litmusctl usage section needs an update.

Location
Update in this doc - website/docs/litmusctl/additional-command.md

Proposed change

Update the doc, taking this as reference

[Malay-dev]

Hey @PriteshKiri, please assign this to me. I'll take up this documentation enhancement. 😃

[PriteshKiri]

@Malay-dev assigned. Happy Hacktoberfest! 🎃

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[PriteshKiri]

Hey @Malay-dev
Thank you so much for your contribution! 🙌
Please keep an eye on your PR, as we may add some review comments if needed before merging it.