fix: use 1000 as websocket close code (#219)

Firefox throws a `DOMException` when using `1001` as close code: `A parameter or an operation is not supported by the underlying object`.
Cannot really find out why this is, but in this case it does not really matter, as the code only runs if there is no connection in the first place.

src/context/WebsocketContext.jsx

@@ -155,7 +155,7 @@ const WebsocketProvider = ({ children }) => {
         needsForceClose
       )
       if (needsForceClose) {
-        websocket.close(1001, 'Force-close pending connection')
+        websocket.close(1000, 'Force-close pending connection')
       }
     }, WEBSOCKET_ESTABLISH_CONNECTION_MAX_DURATION)