Fix function name

Assets/ScriptableRenderPipeline/Core/Shadow/Resources/DebugDisplayShadowMap.shader

         {
             Varyings output;
             output.positionCS = GetFullScreenTriangleVertexPosition(input.vertexID);
-            output.texcoord   = GetFullScreenTriangleTexcoord(input.vertexID) * _TextureScaleBias.xy + _TextureScaleBias.zw;
+            output.texcoord   = GetFullScreenTriangleTexCoord(input.vertexID) * _TextureScaleBias.xy + _TextureScaleBias.zw;
 
             return output;
         }