Add LLM Translations V2 (#2377)

* ## ✅ Translated to Simplified-Chinese - 1 file

| **Source** | **Output/Count** | **Language** |
| :--- | :--- | :--- |
| `docs/en/guides/81-how-databend-works/02-how-databend-optimizer-works.md` | `docs/cn/guides/81-how-databend-works/02-how-databend-optimizer-works.md` | Simplified-Chinese |

* Update 02-how-databend-optimizer-works.md

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Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: z <[email protected]>

Author: github-actions[bot]