disable compute buffer temporarily (need to fix a laggy issue before enabling it again)

Runtime/ui/renderer/cmdbufferCanvas/rendering/canvas_shader_initializer.cs

 
 namespace Unity.UIWidgets.ui {
     static partial class CanvasShader {
-        const bool enableComputeBuffer = true;
+        const bool enableComputeBuffer = false;
 
         const bool enableDebugLog = false;