Update create-manage-data-plane-keys.md

[nimithajalal]

Proposed changes

Write a clear and concise description that helps reviewers understand the purpose and impact of your changes. Use the
following format:

Problem: Grammar corrections.

Solution: Verify using MSTP

Testing: NA

Please focus on (optional): NA

If this PR addresses an issue on GitHub, ensure that you link to it here:

Closes #ISSUE

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1. Potentially sensitive changes include anything involving code, personally identify information (PII), live URLs or significant amounts of new or revised documentation. Please refer to our style guide for guidance about placeholder content. ↩

[github-actions]

✅ All required contributors have signed the F5 CLA for this PR. Thank you!
_{Posted by the CLA Assistant Lite bot.}

[mjang]

Thanks so much for your contribution!

[mjang]

We need. you to add the following comment, to specify that you accept contributing with our open source license:

I have hereby read the F5 CLA and agree to its terms

Also see #513 (comment)

[nimithajalal]

I have hereby read the F5 CLA and agree to its terms

[ADubhlaoich]

recheck