toggle off -> turn off

Co-authored-by: A Thousand Ships <[email protected]>

Author: FarzadBT

tutorials/shaders/your_first_shader/your_first_3d_shader.rst

@@ -277,7 +277,7 @@ Interacting with light
 
 First, turn wireframe off. To do so, click in the upper-left of the Viewport
 again, where it says "Perspective", and select "Display Normal".
-Additionally in the 3D scene toolbar, toggle off preview sunlight.
+Additionally in the 3D scene toolbar, turn off preview sunlight.
 
 .. image:: img/normal.png