[main] Fix 404s

[dkalinowski]

No description provided.

[Copilot]

Pull request overview

This PR updates documentation links and table formatting to eliminate 404s and improve rendered API parameter tables in the REST API docs.

Changes:

• Pin XGrammar documentation links to a specific tag (v0.1.26) to avoid breakage from upstream default-branch changes.
• Fix missing table row indices for response_format in REST API parameter tables.
• Correct a relative link to the OpenShift ServingRuntime spec and update an external OpenWebUI RAG reference link.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
docs/model_server_rest_api_responses.md	Fixes the response_format table row index and pins the XGrammar link to a versioned path.
docs/model_server_rest_api_chat.md	Fixes the response_format table row index and pins the XGrammar link to a versioned path.
docs/deploying_server_kubernetes.md	Corrects the relative link to extras/openshift_AI/ServingRuntime.yaml to prevent a broken path.
demos/integration_with_OpenWebUI/README.md	Updates the OpenWebUI RAG reference URL to a current, presumably stable documentation location.