Update grid snap info in your_first_game.rst (#3126)

getting_started/step_by_step/your_first_game.rst

@@ -674,10 +674,9 @@ you will see some new buttons at the top of the editor:
 .. image:: img/path2d_buttons.png
 
 Select the middle one ("Add Point") and draw the path by clicking to add
-the points at the corners shown. To have the points snap to the grid, make sure "Snap to
-Grid" is checked. This option can be found under the "Snapping options"
-button to the left of the "Lock" button, appearing as a series of three
-vertical dots.
+the points at the corners shown. To have the points snap to the grid, make
+sure "Use Grid Snap" is selected. This option can be found to the left of
+the "Lock" button, appearing as a magnet next to some intersecting lines.
 
 .. image:: img/draw_path2d.gif