Update README.md

README.md

@@ -91,6 +91,7 @@ sorter | Apply a sort to the API list. It can be 'alpha' (sort paths alphanumeri
 onComplete | This is a callback function parameter which can be passed to be notified of when SwaggerUI has completed rendering successfully.
 onFailure | This is a callback function parameter which can be passed to be notified of when SwaggerUI encountered a failure was unable to render.
 highlightSizeThreshold | Any size response below this threshold will be highlighted syntactically, attempting to highlight large responses can lead to browser hangs, not including a threshold will default to highlight all returned responses.
+supportedSubmitMethods | An array of of the HTTP operations that will have the 'Try it out!` option. An empty array disables all operations. This does not filter the operations from the display.
 
 * All other parameters are explained in greater detail below