updated readme

Author: mishushakov

README.md

@@ -176,8 +176,8 @@ desktop.middle_click()
 desktop.scroll(10) # Scroll by the amount. Positive for up, negative for down.
 desktop.mouse_move(100, 200) # Move to x, y coordinates
 desktop.drag((100, 100), (200, 200)) # Drag using the mouse
-desktop.mouse_down("left") # Press the mouse button
-desktop.mouse_up("left") # Release the mouse button
+desktop.mouse_press("left") # Press the mouse button
+desktop.mouse_release("left") # Release the mouse button
 ```
 
 **JavaScript**