Update README

Author: sotanmochi

Assets/CustomTextureRenderer/README.md

@@ -5,6 +5,8 @@ A graphics utility to update textures from native plugins.
 ## NonBlockingCustomTextureRenderer
 `NonBlockingCustomTextureRenderer` is a high performance graphics utility to update textures from native plugins.
 
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 The function for updating textures runs on another thread.  
 Asynchronous GPU upload (partial data copy) reduces the processing time per frame in the main thread for large size textures.
 
@@ -14,6 +16,8 @@ Asynchronous GPU upload (partial data copy) reduces the processing time per fram
 `CustomTextureRenderer` is an example to update textures from native plugins 
 using [CommandBuffer.IssuePluginCustomTextureUpdateV2](https://docs.unity3d.com/ScriptReference/Rendering.CommandBuffer.IssuePluginCustomTextureUpdateV2.html).
 
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 The function for updating textures runs on Unity's Render Thread.
 
 `CustomTextureRenderer` does not work on IL2CPP.