fix: Determine which clusters to be installed by parameters (#1082)

Code Source From: Self Code
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Jira:
市场项目编号（名称）：

Signed-off-by: suwanliang_yewu <suwanliang_yewu@cmss.chinamobile.com>

Signed-off-by: suwanliang_yewu <suwanliang_yewu@cmss.chinamobile.com>

docs/platform-engineers/addon/addon-cue.md

@@ -188,7 +188,11 @@ output: {
 If you execute the command to enable the addon as follows:
 
 ```shell
-$ vela addon enable <addon-name> clusters=local,cluser1
+$ vela addon enable <addon-name> --clusters=local,cluster1
+```
+or:
+```shell
+$ vela addon enable <addon-name> clusters="{local,cluster1}"
 ```
 
 The rendering result will be: