Merge pull request #1997 from shimat/fix/stale-ffmpeg-dll-version-in-tests

Fix stale FFmpeg plugin DLL reference in test project

Author: shimat

test/OpenCvSharp.Tests/OpenCvSharp.Tests.csproj

@@ -50,7 +50,7 @@
     <None Update="OpenCvSharpExtern.dll">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>
-    <None Update="opencv_videoio_ffmpeg4130_64.dll">
+    <None Update="opencv_videoio_ffmpeg500_64.dll">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>
   </ItemGroup>