Add better test image for uint rgba pixel type

Author: brianpopow

tests/ImageSharp.Tests/TestImages.cs

@@ -1389,7 +1389,7 @@ public static class Exr
         public const string UncompressedRgba = "Exr/Calliphora_uncompressed_rgba.exr";
         public const string UncompressedFloatRgb = "Exr/rgb_float32_uncompressed.exr";
         public const string UncompressedUintRgb = "Exr/Calliphora_uint32_uncompressed.exr";
-        public const string UintRgba = "Exr/rgba_uint_zip_compressed.exr";
+        public const string UintRgba = "Exr/rgba_uint_uncompressed.exr";
         public const string Zip = "Exr/Calliphora_zip.exr";
         public const string Zips = "Exr/Calliphora_zips.exr";
         public const string Rle = "Exr/Calliphora_rle.exr";

tests/Images/External/ReferenceOutput/ExrDecoderTests/ExrDecoder_CanDecode_Uncompressed_Rgba_ExrPixelType_Uint_Rgba32_rgba_uint_uncompressed.png

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:0b45345cb1e4539e5298ccce3ccfc0f27b7a469836bfd7aa13c4d9f6c52baa7a
+size 482731