chore: adding keploy to the list of shadow testing tools

[nehagup]

Pull Request Template

What are you trying to address

As discussed in this PR, it would be fantastic if Keploy could be added to the list above to assist developers in solving the shadow testing challenge.

Checklist

READY TO PR? Use the check-list below to ensure your branch is ready for PR.

• Changes follow the repo structure and land in the appropriate folder and section
• No confidential information
• No duplicated content
• Labeled appropriately
• This PR was reviewed by at least one subject matter expert
• No lint check errors related to your changes

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[nyouens]

Thank you :)

[nehagup]

Hi @shiranr can you please review this one? It's a small change. :)