Update TTS model in quickstart guide

[leng-yue]

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Summary by CodeRabbit

• Documentation
  • Updated the default text-to-speech model in the quickstart cURL example.

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ℹ️ Recent review info

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Reviewing files that changed from the base of the PR and between 2fecac9 and 69e47d3.

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• developer-guide/getting-started/quickstart.mdx

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📝 Walkthrough

Walkthrough

The quickstart cURL TTS request now specifies s2.1-pro-free instead of s2-pro. The <Support /> declaration is unchanged.

Changes

Quickstart documentation

Layer / File(s)	Summary
Update the default cURL request model developer-guide/getting-started/quickstart.mdx	The cURL request model changes from s2-pro to s2.1-pro-free. The <Support /> declaration remains unchanged.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~3 minutes

Change: Other

Merge Risk: ⚪ Minimal · up to 69e47

The quickstart now uses the documented free-tier model, which the request contract accepts; no actionable merge-blocking behavior is evident.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: updating the TTS model in the quickstart guide.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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