Better test image for uint pixel type

tests/ImageSharp.Tests/TestImages.cs

@@ -1388,7 +1388,7 @@ public static class TestImages
         public const string Uncompressed = "Exr/Calliphora_uncompressed.exr";
         public const string UncompressedRgba = "Exr/Calliphora_uncompressed_rgba.exr";
         public const string UncompressedFloatRgb = "Exr/rgb_float32_uncompressed.exr";
-        public const string UncompressedUintRgb = "Exr/rgb_uint32_uncompressed.exr";
+        public const string UncompressedUintRgb = "Exr/Calliphora_uint32_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_Rgb_ExrPixelType_Uint_Rgba32_Calliphora_uint32_uncompressed.png

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:f66bf45b5d80e412314341567b8cf240d56b5872f01ce9f3b0d6034d85e8e942
+size 163327

tests/Images/External/ReferenceOutput/ExrDecoderTests/ExrDecoder_CanDecode_Uncompressed_Rgb_ExrPixelType_Uint_Rgba32_rgb_uint32_uncompressed.png

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:15adaff9755ff38f0a2b30180ced9e52ac1bf51b8f3b80fd26d85f18c0eef686
-size 68918

tests/Images/Input/Exr/rgb_uint32_uncompressed.exr

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:487f4641908b0c5c34e7cc3be439eff31e5e8d2fd03a9d17d39dc3dc5e55874d
-size 243558