Docs: Fix link

docs/api/materials/ShaderMaterial.html

@@ -14,7 +14,7 @@
 
 		<div class="desc">
 			A material rendered with custom shaders. A shader is a small program written in
-			[link:https://www.khronos.org/files/opengles_shading_language.pdf_ES GLSL] that runs on the GPU.
+			[link:https://www.khronos.org/files/opengles_shading_language.pdf GLSL] that runs on the GPU.
 			You may want to use a custom shader if you need to:
 		<ul>
 			<li>implement an effect not included with any of the built-in [page:Material materials]</li>