docs: refine README.md

diff --git a/README.md b/README.md
index 6148231c55b6e60fa678f1f3806fc3b9b3969b6a..750ad8e2968c5017a1101f864706cf357441ff4b 100644 (file)
--- a/README.md
+++ b/README.md
@@ -573,7 +573,7 @@ Set the Websocket header _Sec-Websocket-Protocol_ to `ui0.0.1`.
    `template`: string,  
    `numberOfStations`: number,  
    `options?`: {  
-   `supervisionUrls`: string | string[],  
+   `supervisionUrls?`: string | string[],  
    `persistentConfiguration?`: boolean,  
    `autoStart?`: boolean,  
    `autoRegister?`: boolean,