[BUG] The double buffered option for shaderNode is incorrect

[o2co2]

What happened?
The double buffered option for shaderNode is incorrect

To Reproduce
Steps to reproduce the behavior:

Setup:

• OS: [e.g. Windows]
• Unity Version: [e.g. 2023.1.7]
• Mixture Version [0.4.2]

Additional informations
Add any other context about the problem here.

[o2co2]

        if (settings.doubleBuffered)
        {
             CustomRenderTextureUpdateZone[] updateZones;

            switch (output.dimension)
            {
                default:
                case TextureDimension.Cube: 
                    throw new NotImplementedException();
                case TextureDimension.Tex2D:
                    updateZones = new CustomRenderTextureUpdateZone[]
                    {
                        new CustomRenderTextureUpdateZone
                        {
                            needSwap = true,
                            passIndex = 0,
                            rotation = 0f, 
                            updateZoneCenter = new Vector3(0.5f, 0.5f, 0.5f),
                            updateZoneSize = new Vector3(1f, 1f, 1f),
                        },
                        
                    };
                    break;
                case TextureDimension.Tex3D:
                    throw new NotImplementedException();
                    break;
            }
            
            settings.doubleBuffered = true;

            // Setup the successive passes needed or the blur
            output.SetUpdateZones(updateZones);
        }