Revert "Fix file name"

This reverts commit 15619ecd88.

tests/ImageSharp.Tests/Formats/WebP/WebpDecoderTests.cs

@@ -441,7 +441,7 @@ public class WebpDecoderTests
 
     // https://github.com/SixLabors/ImageSharp/issues/2670
     [Theory]
-    [WithFile(Lossy.Issue2676, PixelTypes.Rgba32)]
+    [WithFile(Lossy.Issue2670, PixelTypes.Rgba32)]
     public void WebpDecoder_CanDecode_Issue2670<TPixel>(TestImageProvider<TPixel> provider)
         where TPixel : unmanaged, IPixel<TPixel>
     {

tests/ImageSharp.Tests/TestImages.cs

@@ -804,7 +804,7 @@ public static class TestImages
             public const string Issue1594 = "Webp/issues/Issue1594.webp";
             public const string Issue2243 = "Webp/issues/Issue2243.webp";
             public const string Issue2257 = "Webp/issues/Issue2257.webp";
-            public const string Issue2676 = "Webp/issues/Issue2676.webp";
+            public const string Issue2670 = "Webp/issues/Issue2670.webp";
         }
     }