`inputs:in.connect` has wrong type in test_assets\TextureTransformTest

[syoyo]

In test_assets\TextureTransformTest
inputs:in.connect uses token type,

assets/test_assets/TextureTransformTest/TextureTransformTest.usd

Line 58 in 98e8a1e

token inputs:in.connect = </TextureTransformTest/Materials/Offset_U_53148/uvReader.outputs:result>

where float2 is expected according to the spec
https://openusd.org/release/spec_usdpreviewsurface.html#transform2d

            def Shader "usdTransform"
            {
                uniform token info:id = "UsdTransform2d"
                token inputs:in.connect = </TextureTransformTest/Materials/Offset_V_53152/uvReader.outputs:result>
                ^^^^^^^^^^^^^^^^^^^^^^^
                float inputs:rotation = 0
                float2 inputs:scale = (1, 1)
                float2 inputs:translation = (0, -0.5)
                float2 outputs:result
            }

Surprisingly, OpenUSD does not check the type of Attribute when it is a Attribute Connection, so tools using OpenUSD can open it without errors(e.g. Blender 4.1)

(Blender 4.1)

Anyway, using float2 inputs:in.connect would be better to make this USD test scene conformant to UsdPreviewSurface Spec.