docs: 透传腾讯云角色授权

Author: rehiy

docs/绑定腾讯云.md

@@ -2,6 +2,8 @@
 
 1、进入 **腾讯云** [CAM - 策略](https://console.cloud.tencent.com/cam/policy/createV3) 页面，切换到 `脚本编辑` 模式，复制如下内容，继续设置名称 `TDPCloudAccess`
 
+> 请务必将授权代码里的 `${UIN}` 替换为你的腾讯云 `uin` 数字串
+
 ```json
 {
     "version": "2.0",
@@ -18,6 +20,13 @@
             ],
             "resource": "*",
             "effect": "allow"
+        },
+        {
+            "action": [
+                "cam:PassRole"
+            ],
+            "resource": "qcs::cam::uin/${UIN}:role/tencentcloudServiceRoleName/*",
+            "effect": "allow"
         }
     ]
 }