Docs: Updated WebGL2 guide

docs/manual/en/introduction/How-to-use-WebGL2.html

@@ -101,6 +101,7 @@ var material = new THREE.ShaderMaterial( {
 
 		[example:webgl2_materials_texture3d WebGL2 / materials / texture3d]<br />
 		[example:webgl2_materials_texture3d_volume WebGL2 / materials / texture3d / volume]<br />
+		[example:webgl2_multisampled_renderbuffers WebGL2 / multisampled renderbuffers]
 	</p>
 
 	<h2>Supported features</h2>
@@ -110,6 +111,7 @@ var material = new THREE.ShaderMaterial( {
 		overview about what's already available in the latest version of three.js.
 		<ul>
 			<li>3D Textures</li>
+			<li>Multisampled Renderbuffers</li>
 		</ul>
 
 	</p>

docs/manual/zh/introduction/How-to-use-WebGL2.html

@@ -99,6 +99,7 @@ var material = new THREE.ShaderMaterial( {
 
 		[example:webgl2_materials_texture3d WebGL2 / materials / texture3d]<br />
 		[example:webgl2_materials_texture3d_volume WebGL2 / materials / texture3d / volume]<br />
+		[example:webgl2_multisampled_renderbuffers WebGL2 / multisampled renderbuffers]
 	</p>
 
 	<h2>支持的特性</h2>
@@ -108,6 +109,7 @@ var material = new THREE.ShaderMaterial( {
 		下列列表展现了在最新版本three.js中，已可用的特性的概览。
 		<ul>
 			<li>3D Textures</li>
+			<li>Multisampled Renderbuffers</li>
 		</ul>
 
 	</p>