Fix shader compilation

ScriptableRenderPipeline/HDRenderPipeline/HDRP/Material/Lit/LitDataIndividualLayer.hlsl

 #ifdef _MATERIAL_FEATURE_CLEAR_COAT
     surfaceData.coatMask = _CoatMask;
     // To shader feature for keyword to limit the variant
-    surfaceData.coatMask *= SAMPLE_UVMAPPING_TEXTURE2D(ADD_IDX(_coatMaskMap), ADD_ZERO_IDX(sampler_coatMaskMap), ADD_IDX(layerTexCoord.base)).r;
+    surfaceData.coatMask *= SAMPLE_UVMAPPING_TEXTURE2D(ADD_IDX(_CoatMaskMap), ADD_ZERO_IDX(sampler_CoatMaskMap), ADD_IDX(layerTexCoord.base)).r;
 #else
     surfaceData.coatMask = 0.0;
 #endif