docs(external docs): fix missing configuration section for websocket_server docs

[esensar]

Summary

In the initial PR, I forgot to add the automatically generated configuration section to the websocket_server docs page.

Change Type

• Bug fix
• New feature
• Non-functional (chore, refactoring, docs)
• Performance

Is this a breaking change?

• Yes
• No

Does this PR include user facing changes?

• Yes. Please add a changelog fragment based on our guidelines.
• No. A maintainer will apply the "no-changelog" label to this PR.

Checklist

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References

Related: #22213

[pront]

We have a new merge conflict on this one

[esensar]

We have a new merge conflict on this one

Yeah, I just saw that. It was a simple one.