Add registered trademark to Zowe where appropriate

[janan07]

Describe your pull request here: Add registered trademark to Zowe where appropriate.
the Linux Foundation page of legal trademarks lists Zowe as a Registered Trademark and not TM:
https://www.linuxfoundation.org/legal/trademarks

This PR update appropriate pages in Zowe Docs to reflect Linux Foundation trademark standards

List the file(s) included in this PR:

After creating the PR, follow the instructions in the comments.

[github-actions]

😺 Thank you for creating this PR! To publish your content to Zowe Docs, follow these required steps.

• Add the label review: doc.
• Identify your content topic with a label. (Examples: area: apiml, area: cli, area: install and config, etc.)
• Specify the major Zowe release(s) for your content. (Examples: release: V1, release: V2, release: V3)
  • If adding content that needs to be removed from V3 documentation, add the V3 N/A tag.
• Select the master branch if your PR updates content that is on the live site. Select docs-staging if your PR updates content for a future release.
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Need help? Contact the Doc Squad in the #zowe-doc Slack channel.

[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 release label is missing. Add a release: label so your content is published with the correct major Zowe release.

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[github-actions]

📌 The subject area label is missing. Add an area: label so we know what your content is about.

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[github-actions]

🔍 The review label is missing. Add a review: label so we can determine who needs to approve this PR.

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[github-actions]

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