Clarify query parameter for nested greetings in Jaeger walkthrough - #56610

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Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: dotnet/docs-actions/status-checker@cdb3719bab6025f7621b04044094048f597b1ae0. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/