WebGLMultipleRenderTargets: Example fix iOS with MSAA (#24141)

* WebGLMultipleRenderTargets: Example fix iOS with MSAA

There is another issue only on iOS, some texture types will break in certain cases. I don't have an explanation of the why, I think it's just a bug.

Also, there was an issue with Safari which was fixed in the latest version (15.5) where it was required to clear the canvas before rendering the scene. I only added comments since this issue has been patched, should we add it anyway?

* Update webgl2_multiple_rendertargets.html

examples/webgl2_multiple_rendertargets.html

@@ -164,7 +164,6 @@
 
 					renderTarget.texture[ i ].minFilter = THREE.NearestFilter;
 					renderTarget.texture[ i ].magFilter = THREE.NearestFilter;
-					renderTarget.texture[ i ].type = THREE.FloatType;
 
 				}