W-18670236-Make explicit that TCP traffic is not supported

[luanamulesoft]

Writer's Quality Checklist

Before merging your PR, did you:

• Run spell checker
• Run link checker to check for broken xrefs
• Check for orphan files
• Perform a local build and do a final visual check of your content, including checking for:
  • Broken images
  • Dead links
  • Correct rendering of partials if they are used in your content
  • Formatting issues, such as:
    • Misnumbered ordered lists (steps) or incorrectly nested unordered lists
    • Messed up tables
    • Proper indentation
    • Correct header levels
• Receive final review and signoff from:
  • Technical SME
  • Product Manager
  • Editor or peer reviewer
  • Reporter, if this content is in response to a reported issue (internal or external feedback)
• If applicable, verify that the software actually got released

[salesforce-cla]

Thanks for the contribution! Unfortunately we can't verify the commit author(s): Henry Mollman <h***@s***.com>. One possible solution is to add that email to your GitHub account. Alternatively you can change your commits to another email and force push the change. After getting your commits associated with your GitHub account, refresh the status of this Pull Request.