upgrade to dotnet 6 (#475)

ErsatzTV.Core.Tests/ErsatzTV.Core.Tests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <TargetFramework>net5.0</TargetFramework>
+        <TargetFramework>net6.0</TargetFramework>
         <NoWarn>VSTHRD200</NoWarn>
     </PropertyGroup>
 

ErsatzTV.Core.Tests/FFmpeg/TranscodingTests.cs

@@ -3,6 +3,7 @@ using System.Collections.Generic;
 using System.Diagnostics;
 using System.IO;
 using System.Linq;
+using System.Security.Cryptography;
 using System.Threading.Tasks;
 using ErsatzTV.Core.Domain;
 using ErsatzTV.Core.Domain.Filler;
@@ -237,7 +238,7 @@ namespace ErsatzTV.Core.Tests.FFmpeg
                 return string.Empty;
             }
 
-            using var sha = new System.Security.Cryptography.SHA256Managed();
+            using var sha = SHA256.Create();
             byte[] textData = System.Text.Encoding.UTF8.GetBytes(text);
             byte[] hash = sha.ComputeHash(textData);
             return BitConverter.ToString(hash).Replace("-", string.Empty);