doc: fix typo in readableStream.locked description

PR-URL: #41923
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Mestery <mestery@protonmail.com>
Reviewed-By: Harshitha K P <harshitha014@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

Author: tniessen

doc/api/webstreams.md

@@ -149,7 +149,7 @@ added: v16.5.0
   {ReadableStream}.
 
 The `readableStream.locked` property is `false` by default, and is
-switch to `true` while there is an active reader consuming the
+switched to `true` while there is an active reader consuming the
 stream's data.
 
 #### `readableStream.cancel([reason])`