docs: 更新README中的示例音频链接

移除本地音频文件并替换为GitHub附件链接，使示例更易于访问和维护

README.md

@@ -187,8 +187,14 @@ python podcast_generator.py --api-key sk-xxxxxx --model gpt-4o --threads 4
 
 您可以在 `example/` 文件夹中找到使用不同 TTS 服务生成的播客示例音频：
 
-*   **Edge TTS 生成示例**: <audio controls src="example/edgeTTS_podcast_1754467217.aac"></audio>
+*   **Edge TTS 生成示例**:
-*   **Index TTS 生成示例**: <audio controls src="example/indexTTS_podcast_1754467749.aac"></audio>
+
+[edgeTTS](https://github.com/user-attachments/assets/3891cf4c-f47f-4c9b-aef6-30ffb3fcefc4)
+
+*   **Index TTS 生成示例**:
+
+[indexTTS](https://github.com/user-attachments/assets/a1d2ebee-3e9a-43cb-bc94-67e3c9b3c45a)
+
 
 这些音频文件展示了本工具在实际应用中的效果。
 
@@ -210,4 +216,4 @@ python podcast_generator.py --api-key sk-xxxxxx --model gpt-4o --threads 4
 ├── podcast_generator.py     # 🚀 主运行脚本
 └── README.md                # 📄 项目说明文档
 
-```
+```

README_EN.md

@@ -186,8 +186,14 @@ All successfully generated podcast audio files will be automatically saved in th
 
 You can find sample podcast audio generated using different TTS services in the `example/` folder:
 
-*   **Edge TTS Sample**: <audio controls src="example/edgeTTS_podcast_1754467217.aac"></audio>
+*   **Edge TTS Sample**: 
-*   **Index TTS Sample**: <audio controls src="example/indexTTS_podcast_1754467749.aac"></audio>
+
+[edgeTTS](https://github.com/user-attachments/assets/3891cf4c-f47f-4c9b-aef6-30ffb3fcefc4)
+
+*   **Index TTS Sample**: 
+
+[indexTTS](https://github.com/user-attachments/assets/a1d2ebee-3e9a-43cb-bc94-67e3c9b3c45a)
+
 
 These audio files demonstrate the actual effect of this tool in practical applications.