Fix "dimensionnal" typo

doc/classes/Texture3D.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 <class name="Texture3D" inherits="Texture" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../class.xsd">
 	<brief_description>
-		Base class for 3-dimensionnal textures.
+		Base class for 3-dimensional textures.
 	</brief_description>
 	<description>
 		Base class for [ImageTexture3D] and [CompressedTexture3D]. Cannot be used directly, but contains all the functions necessary for accessing the derived resource types. [Texture3D] is the base class for all 3-dimensional texture types. See also [TextureLayered].