Fix duplications

[janan07]

Describe your pull request here: Fix duplications as per peer review

List the file(s) included in this PR: configure-certificates.md, sidebars.js

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[github-actions]

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[github-actions]

📁 The PR description is missing the file name(s) for the updated content. List all the files included in this PR so this information displays in our Zowe Docs GitHub Slack channel.

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[github-actions]

📁 The PR description is missing the file name(s) for the updated content. List all the files included in this PR so this information displays in our Zowe Docs GitHub Slack channel.

If you have addressed this issue already, refresh this page in your browser to remove this comment.

[github-actions]

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