docs(README): add section for updating and uninstalling system agent

README_CHT.md

@@ -34,6 +34,7 @@
 - [安裝](#安裝)
   - [手動安裝](#手動安裝)
   - [資料夾結構](#資料夾結構)
+- [更新 / 卸載系統代理 (System Agent)](#更新--卸載系統代理-system-agent)
 - [截圖](#截圖)
   - [閒置休眠](#閒置休眠)
   - [監控](#監控)
@@ -144,6 +145,20 @@
 └── .env
 ```
 
+## 更新 / 卸載系統代理 (System Agent)
+
+更新：
+
+```bash
+bash -c "$(curl -fsSL https://github.com/yusing/godoxy/raw/refs/heads/main/scripts/install-agent.sh)" -- update
+```
+
+卸載：
+
+```bash
+bash -c "$(curl -fsSL https://github.com/yusing/godoxy/raw/refs/heads/main/scripts/install-agent.sh)" -- uninstall
+```
+
 ## 截圖
 
 ### 閒置休眠