Standard_material_3d.rst - Material Shadow Mode names Updated

Material Shadow Mode names were wrong. Documentation read 
"Do Not Receive Shadows" And "Use Shadow To Opacity"

As of Godot 4.5, Editor's actual fields read:
"Disable Receive Shadows" and "Shadow To Opacity".

Updated to match.

Author: PHATASS-Studios

tutorials/3d/standard_material_3d.rst

@@ -676,14 +676,14 @@ for a full list of options and their description.
 Shadows
 -------
 
-Do Not Receive Shadows
-~~~~~~~~~~~~~~~~~~~~~~
+Disable Receive Shadows
+~~~~~~~~~~~~~~~~~~~~~~~
 
 Makes the object not receive any kind of shadow that would otherwise
 be cast onto it.
 
-Use Shadow to Opacity
-~~~~~~~~~~~~~~~~~~~~~
+Shadow to Opacity
+~~~~~~~~~~~~~~~~~
 
 Lighting modifies the alpha so shadowed areas are opaque and non-shadowed
 areas are transparent. Useful for overlaying shadows onto a camera feed in AR.