Fix capital letter in SpriteMaterial doc

docs/api/en/materials/SpriteMaterial.html

@@ -29,7 +29,7 @@
 
 		<h2>Examples</h2>
 		<p>
-			[example:webgl_sprites WebGL / sprites]<br />
+			[example:webgl_sprites webGL / sprites]<br />
 			[example:software_sandbox software / sandbox]<br />
 			[example:svg_sandbox svg / sandbox]<br />
 			[example:webgl_materials_cubemap_dynamic webgl / materials / cubemap / dynamic]