[tw] Update term to latest version

[KevinSpringfield]

Describe your changes

Removed wha-it-is header from these terms:

• [x] transport-layer-security
• [x] vertical-scaling
• [x] virtual-machine
• [x] virtualization
• [x] zero-trust-architecture

Related issue number or link (ex: resolves #issue-number)

related to https://github.com/cncf/glossary/issues/2662

Checklist before opening this PR (put x in the checkboxes)

• [x] This PR does not contain plagiarism
  • don’t copy other people’s work unless you are quoting and contributing it to them.
• [x] I have signed off on all commits
  • signing off (ex: git commit -s) is to affirm that commits comply DCO. If you are working locally, you could add an alias to your gitconfig by running git config --global alias.ci "commit -s".

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