Fix: update support link to KB K000140156

[mjang]

Proposed changes

Fix links to support pages in the docs repo. (In different PRs, I'll update the same links in other repos.)

Helps close related issue https://github.com/nginxinc/docs/issues/1005

Checklist

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• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

Release notes

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please add a brief note that summarizes the change.