[doc] Add missing space

Author: lpinca

doc/ws.md

@@ -304,7 +304,7 @@ This class represents a WebSocket. It extends the `EventEmitter`.
   - `allowSynchronousEvents` {Boolean} Specifies whether any of the `'message'`,
     `'ping'`, and `'pong'` events can be emitted multiple times in the same
     tick. Defaults to `true`. Setting it to `false` improves compatibility with
-    the WHATWG standardbut may negatively impact performance.
+    the WHATWG standard but may negatively impact performance.
   - `autoPong` {Boolean} Specifies whether or not to automatically send a pong
     in response to a ping. Defaults to `true`.
   - `closeTimeout` {Number} Duration in milliseconds to wait for a graceful