docs: Update TOC.md files

prompts/opensource-prj/TOC.md

@@ -16,3 +16,10 @@
 - [文本转网页](./%E6%96%87%E6%9C%AC%E8%BD%AC%E7%BD%91%E9%A1%B5.md)
 - [空格zephyr‘s claude prompt](./%E7%A9%BA%E6%A0%BCzephyr%E2%80%98s%20claude%20prompt.md)
 - [阅读理解巩固](./%E9%98%85%E8%AF%BB%E7%90%86%E8%A7%A3%E5%B7%A9%E5%9B%BA.md)
+
+## Subdirectories
+
+### suna
+
+- [agent_system_prompt](./suna/agent_system_prompt.md)
+