[Doc] Update README with deepseek-v4-pro pricing note (#776)

* Revise DeepSeek Pro pricing and service details

Update pricing and service notes for DeepSeek Pro.

* Update README with DeepSeek-V4-Pro pricing note

Added note about DeepSeek-V4-Pro service throughput and expected price reduction.

* Update README.zh-CN.md

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

* Update README.md

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

* Revise DeepSeek-V4-Pro pricing and service notes

Updated pricing and service throughput information for DeepSeek-V4-Pro.

* Update README.zh-CN.md

---------

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

README.md

@@ -320,6 +320,9 @@ Legacy aliases `deepseek-chat` / `deepseek-reasoner` map to `deepseek-v4-flash`.
 
 *DeepSeek Pro rates currently reflect a limited-time 75% discount, which remains valid until 15:59 UTC on 31 May 2026. After that time, the TUI cost estimator will revert to the base Pro rates.*
 
+> [!Note]
+> For the latest DeepSeek-V4-Pro pricing, including the current 75% discount valid until 15:59 UTC on 31 May 2026, please consult the official [DeepSeek pricing page](https://api-docs.deepseek.com/zh-cn/quick_start/pricing). All rates listed in the README correspond to the officially published values.
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 ## Publishing Your Own Skill

README.zh-CN.md

@@ -302,6 +302,9 @@ LANG=zh_CN.UTF-8 deepseek run
 
 *DeepSeek Pro 价格是限时 75% 折扣，有效期到 2026-05-31 15:59 UTC；该时间之后 TUI 成本估算会回退到 Pro 基础价格。*
 
+> [!Note]
+> 关于 DeepSeek-V4-Pro 的最新定价信息，请参阅官方 [DeepSeek 定价页面](https://api-docs.deepseek.com/zh-cn/quick_start/pricing)，请注意目前可享受 75% 的折扣，该优惠有效期至 **2026 年 5 月 31 日 23:59（北京时间）**。此外，README 文档中所列出的所有价格，均与官方发布的数值保持一致。
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 ## 创建和安装技能